Jessica's mom got Cataclysm for me, early, so Jessica went and bought the in-game pets I didn't already have. They all snagged me an ice-cream cake, which we consumed after J and I returned from dinner (went out for Mexican). Mostly, though, we spent the better part of the day rampaging around Azeroth, ending the day with some very nice snuggle time.
It may not sound like much, but it was the best birthday I've ever had.