Theme Friendly, an upcoming site for commercial theme reviews
Theme Friendly is a project by Alex Mansfield that will serve to offer commercial WordPress theme reviews. Alex is also blogging his efforts to build the site itself, which is fun.
It looks like Alex will be running each theme through theme check and doing other tests. I hope he also does a more nuanced code review, along with commentary on the themes. I think that would be highly valuable in the vast and complicated space that the commercial theme market has become.