I'm still having some trouble with this on OSX. I got it to work once on Friday but I don't know what the hell I did. I was changing so many things at once that I may have changed whatever WAS working.
My setup is:
Motorola Cable Modem -> D-Link WRT54G v1.02 -> iMac running OSX 10.8. All...
if they get permission from 4j (the studio who helped put minecraft on consoles), they could put the console edition tutorial worlds in the game, as seeds
and i mean all of them (if not, maybe a few highlights, like TU1, TU31, and TU69)