I remember an interview with Jeff Robins and Ted Serbinski discussing issue's and challenges converting the concept theme of TWiT.tv to a Drupal theme. I can't find the original podcast on the Twit site now but it had some really good coverage of various issues one could run into.
When fully porting a theme, you really need to consider the site it will be used for, layout, content markup that is appropriate for your site.
Dark Ritual is a 3 column fixed width theme that uses floats. This will be a quick and dirty theme concept port, not a clean port of a theme to a fully functional version but should get you most of the way there.

