Stolen directly from Luke's blog, the Super Bowl commercials on Google Video. MSN's got quite a few too. Each site has commercials not on the other.
My favorites, in no particular order:
Bud Light: magic fridge
Budweiser: the wave
Burger King: Whopperettes
Ameriquest: don't judge (plane)
Special honors for the V for Vendetta trailer, which looks very interesting on its own, but is also far more entertaining-looking than all of the other movie trailers I saw.
Also, special mention for the GoDaddy commercials, which focused primarily on attractive women's T&A and still managed to suck. However, the Scott Tissue Mike Ditka Halftime Flush wins hands-down for the most unpleasant ad.
Plenty of other good ones too: Degree, MasterCard, Sierra Mist, and the other Ameriquest ad. And, I didn't have to sit or even fast forward through the silly game!
(On a side note, Leonard Nimoy in the Aleve commercial reminded me a lot of Steve Jobs at Macworld and pretty much anything else he does dressed all in black with huge screens behind him.)