Cartfly

A single site where you can sell goods across hundreds of sites

Website: http://www.cartfly.com/

Cartfly creates a new online commerce ecosystem that dramatically increases the opportunities for online retailers (incuding bands) to sell their merchandise by enabling sales in multiple locations simultaneously across major social networks, like MySpace, Facebook, and Bebo, or anywhere else on the web. Why limit your store to one location, when you can have hundreds? Cartfly, free stores everywhere.

60% of their merchants are bands and the rest are independent artists of some sort.