Best Battle Level
Rainforest Revelry

Best Other MP Level
Greed

Both of these two above were the ones I got the most fun out of. I'll admit I haven't played every nomination.

Best Tileset
Casualty Mines

Though there were a lot of good choices, including two LMAT releases and a good (albeit limited) tileset by moonblaze.

Best JCSer
Snooze

He was really prolific this year, and the levels were good quality too.

Most Improved
Gus

Fawful is a close runner up, but Gus this year went from being a decent tileset maker to one of the best, and I think that means he deserves a vote. A lot of his tilesets lately have been of a more experimental flavour, but they are still interesting.