Microsoft’s mobile division is in a pickle. And not one of those really tasty pickles, all crisp and the perfect mix of sour, sharp and savory. No, this is a pretty crappy pickle to be in. See, Apple, Google and RIM are all established in the smartphone space. They need to be, given that mobile search revenue is soaring, app sales are booming and hardware makers are raking in cash hand over fist. These people make pickles your Polish grandmother would be jealous of. So Microsoft cannot afford to sit mobile out. On the flip side, coming in to compete against those three and others like Nokia (who, I hear,…