New Discoveries in Opera
If you're using Opera, check out the skins! I've looked at them before but never got around to fully using the interface. And that was a few versions ago so they didn't have the current system in place now. It is wicked cool, man! You bring up the interface and can browse the skins right through the task window. Then, you can instantly preview them in your own browser before choosing to install them or not! You can even change the colour scheme and change the icons.
Go to Tools > Appearance and from the skin tab choose "Find more skins". I like "Fresh", Jeevesbond prefers "Tango CL".