Moose Drool and Alaskan Amber are two I remember from when I was in the states.
There were such a massive variety of beers that differed from state to state I can't remember the names. But I absolutly loved all the American Microbrews I had. Everytime I went to the store I always tried a different type, rather than getting the coors/miller type piss.
Considering The US has such a smaller drinking culture compared to England, their Beer outclasses ours by miles.