I have never had a cell phone so a little info on your G1 please.
I ride motorcycles, I use linux, and I want a small portable internet device, that can make a phone call occassionally, I don't text. So I want to look at the Android 2.0s. The GPS part sounds great. The linux part sounds great too.
When you say they sync to the cloud. Does that mean if you don't have an internet connection you loose all your contacts? Like I use gmail but if I can't get to the internet they are all gone. What happens if your driving around and lose 3G connection?
Do you loose all your apps with no internet too? What about saved files and such?
Do you like the on-screen keyboards or the flip out keyboards? Why? To me on my bike it would seem easier to be able to hit the screen, GPS probably not email or gnometris or something.

I suppose I could try...
Why did you pick a G1 over a iPhone or yea even a winDoze phone?