We were surprised by how much we liked iBackFlip Studios' iBackFlip Original this past fall, so we were excited to receive the company's new Somersault ($120). Compatible with all three iPads, this new bag takes the same basic concept of a sling carrier with a flip-open iPad holder and builds on it. Made of nylon, there are quite a few more pockets varying from iPhone-sized to large enough to hold an 11" or 13" MacBook Air. A hole reinforced with…