As I mentioned earlier;
its for the Isheep... but hopefully we might get lucky. Sadly, this will be heavily carrier dependant. As long as they get a version out, I am confident the community here will get a working apk for any platform working and with 3G too.
I currently use Skype that has been hacked to work with 3G data (and even works with EDGE speeds). However, before Skype released their latest version, there were many apks that just didnt work. They either only worked for Skypeout in the US or was setup to work on particular networks. I am a happy camper now though. Just need a video app just like you do.
In the meantime, Tango is brilliant! I love it