Uh since 2001 I think, played the same levels over and over again: Snow Bunnies, Dashing Thru the Snow, Tinsel Town, Darn Ratz, Retro Rabbit and Frog Stomp.
I am trying to find a copy of JJ2 here in Australia (Like it's ever going to happen, only seen it once)..

EDIT: After what Pako Spanrabbit just said I have come out with a bit more questions:

1) Can I download maps of J2O and use them in multiplayer?
2) Can I download Single Player Episodes? (I am guessing that I can't)

Sorry for all these questions :P