http://weblog.infoworld.com/udell/2005/06/23.html en-us Jon Udell's del.icio.us affinity feed The typical office worker is interrupted every three minutes by a phone call, e-mail, instant message or other distraction. The problem is that it takes about eight uninterrupted minutes for our brains to get into a really creative state. http://news.com.com/2102-1022_3-5797028.html?tag=st.util.print After a couple months of part-time tinkering, I have finally switched the foundation of my personal communication strategy over to VoIP, SIP, and Asterisk; away from relying on mobile carriers. http://www.ampersand.com/blog/2005/07/20/asterisk-based-comm/ Towers are registered with the FCC. We've taken the information and compiled it into a searchable database. By viewing that information in Google Maps, we provide a simple graphical interface to see towers within the area. http://www.cellreception.com/towers/index.html