i installed this on my phone. it works pretty well, considering they are having to work with an incomplete reverse-engineered toolchain, just like all the other iphone developers.

at work, it pinpointed my position perfectly. when i got home, it said it didn't know any of the nearby cellphone towers, and locked up my whole phone. oh well, we're living on the edge.

More coverage here: http://gizmodo.com/gadgets/apple/iphone-gps-hack-works-and-i...

The implications of this could be huge for iPhone application developers.