Not to be harsh, but i don't really like it.
The main page looks very divided and scattered, the calendar seems out of place, and the links are all different colors...
When viewing a single page, the content drops down while the sidebar moves up (meanwhile the big yellow recent posts post-it disappears). The header to the commentform should not be black, and there should be some margin on the commentform- it's too close to the left side of the screen.
The search results are no good either. If there is a failed search, the sidebar jumps across the screen. If the search brings up results, the text is black (against a dark grey background) and the links are bright orange. These are poor color choices.
My suggestion would be to drop the ads and try to find more content that you could add to the sidebar. I would center the content, and try to have some organization to the layout (like dividing lines and whatnot). I would also suggest having some sort of continuity in your link styles. It would be helpful to look into fonts, font sizes, and colors.
I do like the effect you have going on up top with the eraser erasing the page (though, i'm not crazy about the erases image). I also like the category-view.