Exquisite design and XHTML 1.0 Strict / CSS valid code. Quite an attractive combination.

A few errors I notice with this theme. All submit buttons use the Search graphic. So, if you go to submit a comment, the button says search. Also, the styling of the H2 tags should be specific to post title, rather than all H2 tags. Finally, there is no pipe between the tags and the comments along the top of the post.