ETA 2014 (mid or late season) or 2015. He just doesn't have the sort of bat that gets promoted aggresively.
There have been doubts about him as a SS in MLB. His arm is below average and the physical tools for range are there, but I've heard he lacks sure hands. With his speed, I would expect him to move to CF. However, he's got about 2 years in MiLB to work on the glove, so I think he will get a long look at short for the next year or so before anyone decides to transition him off short.