Tut of The Month: Reverse Engineer An Awesome CSS3 Menu With jQuery Fallback For Older Browsers
You can view a live demo here.
This effect purely employs CSS3 using absolutely no images and has a nice jQuery fallback for browsers that don't support CSS3. If you're a tutsplus member, you can check out the video tutorial but if you're not check out the source and reverse engineer this puppy.
Check out the article!