I'm a little confused about how this is going to work over wifi only. Where i live t-mobile has 0 coverage and i'm getting an N900 no matter what. Is there going to be a way to make/receive calls easily over wifi only? Also, this was just posted on engadget: http://www.engadget.com/2009/10/27/g...nes-voicemail/ stating that we can now use our existing # with google voice? Will that work over wifi? Thanks!