Hayate the Combat Butler
The characters constantly break the fourth wall to good comic effect, as can be seen in the opening Mecha sequence. It's hard to decide who's dumber Hayate or Nagi but they both have there moments. If you like comedies like "Dumb and Dumber" or "Bill and Teds Excellent Adventure" then this is the anime for you, personally I think it's hilarious. Oh and don't worry it's not a mecha!
Download the bit torrent file for episodes 1-6 here. The screen caps are from the SS-Eclipse release and they do a great job fan subbing this.