HighERtower has been on the server for a while. It is fun but it is almost impossible to cap so you have to rtv to change the map or you are on it all night. Other than that the map is fun for about 30 min.
Agreed, Highertower is fun to play on as a novelty but it gets stale quickly. I've heard 2fooooort (or whatever it's called) is actually hell - I'd try it out but I don't see it being anything more than a one-round wonder.
Checked out a youtube of 2foooooort and the map is so long that sniper bullets/rockets/etc. don't travel the full distance. It's too long to shoot across.