IMVU.com allows clothing to be created by the community, this has a huge virtual and real life economy to it. Millions of items being created and some people doing it as a full-time job in real life.
You showcase your products on the market for a certain fee, and IMVU takes a percentage cut. The business seems to work both for the company and for the developers of the clothing.
I know people who spend almost their whole paycheck on just buying virtual clothes for their avatar, so its a big potential market. I just wanted to throw out the idea of doing this as well as showcase some of the outfits some stylists have designed http://www.imvuoutfits.com/