You can find all of their commercials here: http://www.geico.com/about/commercials/. IMHO, they've got quite a few funny ones.
Funny yes, but also a show stopper as in an interruption of the programming.
I think I've seen a few Geico ads while in America, isn't that the lizard with the British accent??
The Shake Weight Parody that's on YouTube beats anything at the moment (I won't link it cos it's rude)
Richard S.