Smartphones smartphones smartphones. 4G! 4G! 4G! That about sums up CTIA's Wireless tradeshow. While there's not a whole lot of breaking news here, there's no shortage of great ideas. Visa and Mastercard were demo-ing their mobile payment systems (V.Me and PayPass) which aim to make online and in-person transactions just that much easier. Meanwhile, smartphones were in abundance - many of which are not yet available in the U.S. And most companies had big ideas for 4G. Here's a look at some of the interesting products I've seen - including some truly out there smartphone cases.