Just gonna give a helpful little tip -
Themes for things like Wordpress don't sell as well as you might hope. If you want to sell themed templates, the best out there are CSS Templates for websites in general. People want to create websites for their businesses every day, but don't know where to begin or how to do it, and don't want hassle. The easiest solution is selling them a CSS Template you wrote up. And a good beginning to that is actually offering a couple free, see how it goes, then work from there.
Facebook, MySpace, etc - Those would probably be another place for themes that would sell better. Wordpress is mainly a blogging platform, and has too much competition with Blogspot, so I don't know if there's enough people who want to pay for a theme.
Just helping.
I don't mean to crash the party, I know you'll get people and I'd love to see some of the themes you do, but if you want to expand to get more business, there's a bigger world than Wordpress. I wouldn't be someone to raise my hand, but that's because I design and script myself.