Re: 13.04 installed. I like it but now I'm bored.
I'll try not to "flame" Gnome-shell. It's a great DE in its own right. However, it's worth pointing out that it uses the Mutter window manager (the successor to Metacity, the default in Ubuntu prior to Unity) instead of Compiz, so all the Compiz effects are incompatible. Mutter has some of its own cool effects built in, but the configurability level may not be sufficient for the bored...
If you're really bored, though, you might try finding a way to have Gnome 3 automatically use Compiz when you log in.
Jane, stop this crazy thing!