Videochat with an iphone

The wife will be getting an iphone 4 soon and I want us to be able to video chat from my rezound to her iphone. There a ton of apps in the market not to mention skype. Can anyone comment on which works best. We will mostly be using 3g and occasionally wifi if that matters. Thanks

oovoo has worked well for us... though she's mostly on wifi, and I was on 4G... so I can't really comment on how well it would work on 3G only

Tango works great. You can use it with any computer or cellphone.

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