The guy at perpetualbeta.com delved into this a few months ago with a couple of posts: http://perpetualbeta.com/release/2009/12/why-the-gplderivative-work-deba

The guy at perpetualbeta.com delved into this a few months ago with a couple of posts: http://perpetualbeta.com/release/2009/12/why-the-gplderivative-work-debate-doesnt-matter-for-wordpress-themes/ http://perpetualbeta.com/release/2009/12/why-the-gplderivati... http://perpetualbeta.com/release/2009/11/why-the-gpl-does-not-apply-to-premium-wordpress-themes/ http://perpetualbeta.com/release/2009/11/why-the-gpl-does-no... From what I understand, he -is- a lawyer, and he has done intellectual property work, so his opinion, at least on the surface, seems insightful. s