Great idea, but IMHO it would have been much nicer if people had created new sheets based on their location and then added the Info, so that it would have been much easier to browse.<p>Or course, location+skill wouldn't have hurt either. 
In the current format, it could potentially become unmanageable and not very user friendly.<p>I'm just going to create a sheet for SF-BayArea see if people adopt it :).