General Discussion thread on SEO

In this thread there is a bit of discussion about drupal "out of the box" SEO according to some rankings by sitening. I'm not sure how reliable sitening is, but it would be interesting to me to test out a couple popular themes, some different modules, some different configurations of those modules, etc. all on the same site and see which configuration scores the highest in their ratings.

Any takers? I may do it if noone else bites :)