Hacks for vB2 are officially released here, and is the place for them on the internet.
As for vB3, you will not find any vB3 hacks here UNTIL the release of RC1 because that is classed as the first stable release. It was the wish of the vbulletin.com staff that vb.org did not allow vB3 hacks until RC1 so thats why you will not find them here.
Note if you would like hacks for any other the vB3's that have been released so far, then check out
www.vbulletin.nl
Just remember vB3 hacks ARE released here when RC1 is out
The End