I just bought a G1 from a friend and am exploring how I am going to use this. I am not much of a cell user, I want this more for the wifi access and am playing with Google Voice. I have a pay as you go call plan, no data plan, and am in a wifi zone about 90% of the time I would want to use it. All is functioning well. I am finding that the battery barely makes it through the day even with light usage. The power manager indicates that about 15% of my usage is wifi, even when I didn't actually connect. I am thinking that the device is working hard scanning for an open connection. Like I said, 90% of the time I am in a known wifi zone with a "remembered" account. So it doesn't really need to be looking all the time. What would be really cool is if there's an app to toggle wifi based on location. I think by GPS since it would be more accurate. Wifi could be off until I get to a given location, then it would automatically fire up and connect. Anybody know of such a thing?