For now, just the trombone and a bit of piano. I'm technically able to play the guitar, but I haven't played that properly for years. I'm also capable of playing the trumpet, which means that I could play other brass instruments, but I really need my own trumpet before I can learn it properly.
Really, I prefer to focus on the trombone at the moment, because I'm improving vastly and am effectively at a professional level and then some. Anything else is just a hobby and my sightreading and improvisation on a trombone are what make me stand out as a player. I'll totally record myself properly at some point.
DEEDIT: Oh yeah, I forgot to mention that I can turn my fingers and mouth to other assorted tat, such as a penny whistle. I played the whistle solo in Simon and Garfunkel's 'You Can Call Me Al' at one point, right after boning. That was just magical.