Might be a bit early, but you can always have a look on the vacancies board (sorry, I can't remember the Deloitte-specific name). Also, if you have contacts in your target office, give them a bell and see what their hot recruiting areas are at the more junior end. From what I understand of how Deloitte works, you've probably worked in a few areas so you are probably still at the stage where you can spin your CV to emphasise experience relevant to a few practices if you're more bothered about getting into the location than precisely what area you work in.