Zack, you have three reasonable options (and hundreds of not reasonable ones):
1. A Treo 750 with Windows Mobile. HW is similar (you can keep your charger ;-) OS sucks but you can live with it. Put Funambol on it and Outlook, for over the air push email and PIM sync (no cradle and no duplications ;-)
2. a BlackBerry. Curve or Pearl (if you want to accept a cramped down keyboard). Curve 8320 has also wifi, which is nice to have. You will like it.
3. an iPhone. You might miss the keyboard, but the rest of the package is awesome (I found out I can put up with the lack of keyboard, which surprised me). If you wait a bit, they will have 3G as well. And the new SDK comes up at the end of the month, so expect lots of new applications (including Funambol).

Among the non-reasonable there are a flurry of strange brands, plenty of battery issues, some Linux phones (not ready for prime time) and more. If you can wait, maybe the new Linux Palm or an Android device would be the one for you. But it is going to take a while...

Cheers,

fabrizio

QWERTY keyboard? Who can type on one of these? They're too small even for my six-year-old granddaughter! For my money, the best smartphone ever was the Kyocera 7135: small form factor, clamshell case that covered the important parts so they didn't get scratched, Graffiti handwriting recognition (OK, some users preferred other recognition s/w; at least you weren't stuck typing on a nanochiclet keyboard!). Yeah, it had its problems (8MB being the biggest one), but it still had all the right ideas. Only under extreme duress could you get a devoted 7135 user to downgrade to a Treo of any flavor.

Interesting-- it seems you feel the same way about the e-mail, that I do about the Tasks app. Tasks are a must as far as I'm concerned. I hear ya, though, on the duplication of calendar items. grrr...

Otherwise, our experience is pretty similar, and I agree that the battery life on the 650 is excellent. I can go 4+ days between charges.

One more thing to put on the list, though. Voice-activated dialing. On the 650, you have to pay extra for it. Lame. But it should be a standard feature. It was on my Kyocera Smartphone 5 years ago, and I still miss it.

I dumped my Treo 650 and bought a Nokia E61i off craigslist from a T-mobile user and put a Cingular/ATT sim in it. Downside is no 3G network for data in the us. Upside is WIFI for higher speeds where WIFI is (now ATT spreading that love a bit more w/Starbucks). Also, we use MS Exchange, and Nokia as a MailForExchange app that syncs email, calendar, todos, contacts extremely well. Plus, I can set up my non-work email accounts. It fits better in my shirt pocket (thinner than the Palm, slightly wider). Battery last a long time. Phone is GSM with global capability. Biggest adjustment is the lack of a touch screen, so I press the D-ring a lot to move around. Built in browswer is good but not a WAP browser -- you go to the regular HTML sites. Has a camera -- better than the Treo's, plus a lot of other features I have not yet figured out, including a voice recorder. The silent feature is not a single switch like the Treo, but it's almost that quick. Press the # key and toggle between Silent and General. Tap the power key and bring up a menu of profiles. Very pleased with the phone solution.

If you can wait a bit longer, Nokia is putting out the E71, which will be sold by ATT and will have US 3G data connectivity.

Loved the 7135 and the 6035 before that! Ditto on the voice recognition.

My company requires the Treo 700. The windows' OS is slow and cumbersome. When I'm using the Calendar/Task/E-Mail functions and receive a call, it takes _forever_ for it to recognize my keyclick to answer the phone. Sometime I lose the call. I use GrandCentral and love it other than the long delay. The more mail I get (we use Outlook), the more often I need to reboot. I prefer the chiklet keys/keyboard also. Loved the Palm tasks (outlook has way too few features - can't do GTD style work mgmt) and palm calculator (used the Interest functions all the time). Thanks for the timely blog.

My brother in law got the Verizon's new LG with the keyboard under the push up screen. Kinda long and I don't like the keys as well as the chiklet style, but workable. Nice screen.

All in all, I think we need to migrate to windows apps. I still need something like topsecret to store all my passwords that have to change every 30-90 days.

I just went through this in replacing my Palm Treo 650. I opted in getting the Motorola Q Global (9h) for AT&T and loved the decision I made ever since. The Motorola Q 9h full-fills all your requirements and more. I believe the keyboard for the Q is far superior to the Treo as is the operating system and applications. I especially like the integration for my email, contact, and calendar between my work exchange server and syncing to my home PC. (Syncing to a local PC is not available with Vista if you are also syncing to an Exchange server. I am still using XP and Active Sync and have no problems.) I personally believe the email app is much better than SnapperFish or the default Treo browser. Oh it also come with an IM application.

It's also nice to have a decent camera and voice dialing (free and better functionality with a hands free headset) again. The browser experience is also much better and I actually jump on the Internet, which I stopped with the Treo because it was just too painful. Another fun feature is it is GPS equipped, so I will be looking at using some GPS software to use with the phone.

Just check out the reviews since the Q has been surpassing the BlackJack in almost all categories. Although I miss the touch screen, I overcame this problem pretty quickly. I liked the Palm for business use, but the Q has actually made having a phone fun again! So do a little research on the Q and I believe you find that not only is a good replacement for the Treo, but if you buy it you will never look back at a Palm OS again. I can't stress enough... good riddance to the Palm Treo and that awful OS, hardware, and applications.

Ten years ago, the Nokia 9000 smartphone series did what others are catching up to now, and got better all the time. I would still look at the Nokias like Brad did.

Check the Palm site...the new Centro for AT&T got announced the day after your post. It looks like it is what you are looking for, but I'll be interested to hear about it if you do...the price certainly looks right.

I just replaced my Treo 650 with the Treo 755p this past weekend. I like the Treo keyboard as well and the screen. This version hides the antenna in the unit, and is lighter. Its still a little bulky, but I do keep it in my pocket without issues. What makes me happiest about this unit is the much faster internet... I'm on SprintPCS; the network is the biggest reason for the speed improvement, I'm sure. I use the included VersaMail package to sync email and calendar with our corporate Exchange server. This version syncs in real time (I had to poll with my older 650), and the MS Office viewers are pre-loaded, too, unlike my older version. Overall, a nice upgrade. But I can't say I did an exhaustive comparison with other models. Palm is tried and true for me, and I was looking for an easy upgrade.