One of the best uses of the PS Vita's rear touch panel comes from the FIFA folks at EA Sports, who realized that the back of the Vita and the back of the goal aren't that different after all.
I've purchased two different versions of FIFA 12 in an attempt to learn a sports game — any sports game. First I got the Xbox 360 version. Then I bought the Vita version. Then I traded in the Xbox 360 version. This video demonstrates one of the major reasons why.