as you probably know there is a TF2 Maps contest running. HERE is a link to the forums with all the maps listed. its probably worth waiting until the comp ends so bug fixes are complete and beta testing feedback incorporated. however, a couple of maps that have caught my eye even at this stage:
They look pretty cool. Would be good to have a test night when the comp is done so we get a chance to play some/all of the new maps and see if any would be good additions