@Brad Potter - I have bought a couple of Theme Forest themes but found them to be very poorly supported and hardly ever updated. If you read the comment threads for the most popular themes, you will find a lot of unanswered questions and complaints.

Obviously, this is down to the individual theme authors but I think the overall model there, in which the theme author does not have much of a long-term interest in a site or customer-base that does not belong to them, does not give creators much motivation to provide support or to update their work. It is a good model for most of Envato's business - selling stock art, audio, Flash widgets etc, stuff that does not require support or updating - but it is not great for WordPress themes.

I am a big fan of Envato's Tuts network, yet another resource that is making it easier than ever to create amazing sites.