With the final release of Dapper Drake, I've given Xgl another shot and it works beautifully, even on KDE. I did have to spend a few hours trying to figure out how to get it working, bu that was mostly because everyone I asked kept giving me the wrong information.

I strongly advise anyone with the vaguest of interest in this to give it a shot.

Has the KDE extension for Compiz made any progress or is the one for Gnome still required?

I'm still running gnome-window-decorator, but I don't have to log in using GDM or anything like that.

Yeah I tried this with dapper drake, was a pain in the ass that I gave up. How long did it take you to set up xgl?

A couple of hours, really. Now that I have a conclusive, actual knowledge of how to do it, I could probably get a Kubuntu installation running Xgl with Compiz in under an hour.

I'd still have no idea how to do it for standard Ubuntu, though >,<