Desperately seeking: Cellco Dead Zone (Not Spot) Mashup

Berkman Center fellow David Isenberg has a great idea for a mashup:

A mashup that lets people add cellular dead zones (not-spots) to a Google Map? I know several places where I lose service predictably every time I drive there. Cellcos have this info but they are keeping it from us. If it were as easy as clicking on a map to add a not-spot (and maybe x-ing your carrier in a check box) it could present some damning data. It could become a reference tool for people shopping for new mobile service.

I couldn't agree more.  If you've followed anything I've written in this blog, you'd know that I routinely say the three most important things when getting a new cellphone/smartphone are coverage, coverage, and coverage. That device could be the coolest thing since sliced bread but if you can't connect to your wireless provider from the places you frequent (home, commute, work, etc.), its pretty much useless. I'd add that it'd be great if we could load some application into our GPS-enabled phones where it would only take one or two buttons to indicate whether or not we have a strong signal from where-ever we're standing and then, once the phone reconnects to the network, it updates the public not-spot database.

Got an idea for a mashup?  Here's the suggestion box (at the Mashup Camp wiki).  Developers are watching.

Update: Now, Doc Searls is on the case with some more detail on how this should work and what's wrong with the information that cellcos currently provide.