Artist Bill Walko has done some really nifty images. Check out his Deviantart page. He's got quite a few really nice Teen Titans illustrations and I was DELIGHTED to see his take on The Power Squad, the aborted all-female super team that I discussed here.
Looks like I'm not the only one who found this idea delicious! Here are a couple more images from his page that I particularly enjoyed!

Modernized Wonder Twins!
The Spider Friends!
The Herald and Bumble Bee! (This was later integrated into a larger Teen Titans group scene, which you can see on his site.)
Best of all... Jem & The Holograms!
This one is entitled "Who Is He Kissing:"
I like how Rio actually looks Latino here! All of his stuff is super adorbz! I think I'm actually going to order prints of a couple of these!