I am thinking about it. I see a lot of web sites going both directions. What say you?
gizmo5 + google voice
Skype & Google Voice (if you're willing to pay for Skype's $2.99/mo U.S. & Canada-only plan with an online number for incoming calls.)
Your call. And Vonage's HQ is near the college I go to, so you can call them or I can probably try to extract answers from the source. ^^