Last year I committed a theme called "holygrail". It was basically Bluemarine reimplemented using the ALA Holy Grail layout, and was more a proof of concept than anything else. Of course, like Holy Grail itself it has some bugs, and its purpose in life, to serve as a base/sample for CSS-based layouts, has now been taken over by much better themes like Zen.

I don't really have the time or interest to work on it at this point, therefore, so I am putting it up for adoption. If anyone wants to take it over, contact me off-list. If no one wants it, I will probably mark it as abandoned.

http://drupal.org/project/holygrail