Startup Nyx Clothing showed a skirt with music controlled LED light effects at the CES 2007.

Nikki met the people from Nyx Clothing at the CES 2007 show floor. Nyx makes LED elements on a flexible substrate that can be integrated into clothing. Nyx already sells custom jackets with scrolling text messages, which starts at $900.

The LED skirt is still a prototype. The lights can light up in sync. with the beats of music. Wearing this one you are the star on every dance floor.

See the Video Report Now to see the LED skirt and other Nyx products in action.
Nyx Clothing is consisting of only 3 people right now. I assume they need some funding to get more of the LED clothes out on the market.
I could not actually find their site typing into Google Nyx, as they say in the video interview.