Ok in Arcane Power there is a feat that you can take that will allow you a familiar. Well the familiars IMHO suck compared to the ones from 3rd edition. They give you a few bonuses and have one or two things they can do, but they can't do simple things like manipulate objects and it only takes one hit to end it's existence. You have to wait to take a short rest before it comes back. In our last game my sorcerer's familiar was killed in the first round and we had three battles before we could take a short rest. I asked my DM to allow me to trade out that feat for something else. IMHO it's not worth wasting a feat to get.