From what I've heard, they just take a while to confirm that you've qualified for the iPod despite what your account may say. A friend of mine said that his account reflected the fact that he had 5 completed referrals but he had to wait an extra two weeks before being able to move onto the next step of actually being sent his iPod.
Nice icon, BTW, zewone. I have the new Mos album preordered at HipHopSite.com where they give you a free b-sides/remixes/rarities/ CD, Dangerous Mix. It's the only place I've seen that has this offer, I don't know if it's a widespread thing or not. Plus, they throw in a free poster, too!