I saw this and just about wet myself in the sheer awe and excitement!
http://iphonefaq.org/archives/97278
GPS on the iPhone... right now!
The iPhone is going to change the world.
I mean, think about it... the entire thing is software!
Once Apple unlocks the SDK and allows third party apps on it...
anything is possible.
It's like getting a new phone with software releases instead of tied down to crap hardware.
I haven't jailbroke my phone yet... but this seems like a great reason to.