Nothing like a good post-Father's Day contest to get you fired up for the week, and this time we have a new iPad up for grabs. The offering is made possible by Rebtel, the largest independent VoIP provider. The service recently launched its own iPad-specific app, which will hook you up with calls and texts over WiFi and 3G. It's free to chat it up with other folks using Rebtel, while you can get ahold of everyone else at an inexpensive cost. As for other platforms, Android and Windows Phone clients are on the way later this year. As an added bonus, the service is also throwing in a credit of $100 to the win
