Java 6 on 32-bit Intel Mac

Dying to have Java 6 on an older, non Core 2 Duo Intel Mac? You should get SoyLatte.

SoyLatte is a functional, X11-based port of the FreeBSD Java 1.6 patchset to Mac OS X Intel machines. SoyLatte is initially focused on supporting Java 6 development; however, the long-term view far more captivating: open development of Java 7 for Mac OS X, with a release available in concert with the official Sun release, supported on all recent versions of Mac OS X.

It lacks some features like system tray support, but overall these folks are doing a way better job than the official Apple Java team.