“Small Potato” is Switching from Creative Commons to GPL:

Despite that I’m just ONE theme designer and despite that I don’t contribute directly the WordPress codes, I believe that switching to GPL is a step in the direction to support the WordPress team and to help the WordPress theme community grow (positively). And, I’d like to encourage other theme designers to make the same decision, or at least sit down and consider switching to GPL.

Good news, I hope that catches on in the theme designing community. I don’t mind Creative Commons, but I worry about linkback requirements. Not because I don’t want to provide credit to theme designers, but because it’s not at all uncommon for people to get tired of doing something online, and allowing a domain to expire — and then you’re still obligated to link to something that’s not what you bargained for.