iPhone 3D + Fring + Skype = Unlimited calling?

Hi

I'm seriously considering getting an iPhone. While browsing the app store on my iPod Touch, i found the Fring application.

I already have a skype account, so I'm wondering if it would work like i've indicated in the title.

It sounds a bit too good to be true, since Fring would basically allow me to make unlimited calls (US AND Canada) without even using up the voice plan. Does Fring work with the 3G/Edge network, or only with Wi-fi?

Thanks!

I typo'ed the title, should have been 3G, not 3D lol

No one knows?

I have tried it using an unlimited calling plan on skype. It only works on wifi. i.e. u can only call phone numbers on skype when your iphone is on wifi.
Skype to skype may work on 3G, havent tried it yet.

Alright, thanks for the info!