I was talking to a coworker the other day about this and we sat down and figured out the same thing. Calling out using google chat with the voice plugin on the browser for outgoing calls and then the google voice manager to handle the incoming calls and voicemails and it all worked great. I also found out that they can port over my cell phone number, so nothing would skip a beat there too. That's good news! So, i ordered my Ipad2 early this morning and bought it with the optional Verizon connectivity so the wife can use it to surf the web while we're on road trips. Looks like we can connect and disconnect at will, no service contracts for the internet service, so that's a huge plus as well since we're normally near wi-fi and won't need their tower service.
Thanks for the tips and input everyone... There's more techies in here than I thought.
Where we've been:
2000 Rockwood Roo M-18 Hybrid
2006 Dodge Ram 2500 Auto 5.9 Diesel
Gone but not forgotten -1986 Rockwood 1003 PUP