Invo is a great theme to run a freelance business from. It is simple and allows you to easily convey your message to current and perspective clients. It comes with a portfolio area, client invoicing and even 2 payment gateways (PayPal and 2Checkout) to take payments from the site. Not features you see every day in a WordPress theme.
Buy Invo and get instant access to all files and support at Themes Kingdom
Themes Kingdom is one of our favorite theme developers from across the pond. They have a number of different themes of all different styles and types. Their themes are really nice and so is the price (that rhymed!). Individual themes go for $25 or you can get access to all themes and plugins for $50 a year. Pretty much and awesome deal.