We covered a number of iPhone VOIP applications, but iCall looks particularly impressive. As you can see in the above video, it allows you to seamlessly transfer a regular inbound cell phone calls to VOIP. This means you can save your minutes any time your iPhone is connected via wifi. As of right now calls are free in the US and Canada, and there is an iCall Pro account that lets you make international calls for a fee. Unfortunately, the iCall application is only available for Windows at the moment but they're promising a Mac version soon. Nonetheless, it's clearly the iPhone application that's most exciting and the company is apparently part of the iPhone Developer Program.Thanks, Ryan!