Hoip - help over IP

I worked on iOS app called HOIP (Help overIP) with my friend Pedja Rusic (http://dribbble.com/Stinkisar).
My part of the job was Objective-C programming :)

You already saw some screenshots, but I want to show you some recorded demo right now :)
Link: http://d.pr/v/xs2y

If you want to be beta tester, put your email at www.hoip.me
I want to hear some feedback about the app, or if you have some nice project for development, let me know, I'm enjoy in making custom UI controls for iOS :)