Good work deserves compensation, but commercial themes are still unusual in the world of WordPress. The new themes directory has well over 200 free themes listed, and the old directory had thousands of them. Still, I like Thesis and f8. Actually, I like a bunch of themes from Graph Paper Press (get them all for $99!). And, as we see WordPress adding so many options that require theme support, the promise of free lifetime upgrades for Thesis is also appealing.