No its not a Minecraft hack.
Well this is a pretty entertaining hack.
ONLY WORKS WITH GOOGLE CHROME.
heres teh info link:
http://uk.kotaku.com/5781311/run-a-katamari-all-over-this-and-any-site
and a picture:

NaNaaaaa nanaNanananaNa naNaa Naaaaa Nanaa Naaaaaa

Reminds me of another little game where you play Asteroids instead:

http://erkie.github.com/

NaNaaaaa nanaNanananaNa naNaa Naaaaa Nanaa Naaaaaa

tuatha1337

lol i know that song