First post in the new minecraft subforum!
Just recently got the game myself, and aside from the server I made for me and my girlfriend, I keep remaking single player worlds all the time trying to get someplace really sweet.
Seeds I've used that got me cool places:
Katamari
Swing
if you've got the 1.9 prerelease, use 5630765669477878057 and look for the mushroom biome featured in
anyway, hope this place really takes off, I love minecraft.