Hopefully Android is next, because this thing would be awesome. Phone calls over wifi without using minutes...
Vonage Unveils iPhone, iPod touch, BlackBerry Apps - Reviews by PC Magazine
Vonage Unveils iPhone, iPod touch, BlackBerry Apps - Reviews by PC Magazine
The iPhone and iPod touch downloads will allow users to make unlimited Vonage Mobile calls in the U.S. over Wi-Fi without using up cell phone minutes. The BlackBerry and iPhone app also run on your existing cellular network, which will eat up minutes.
Cell phone numbers remain the same. Users can dial directly from an existing address book without calling cards or PIN codes, Vonage said.