I really didn't like it at first glance, but on closer inspection most of the detailing is very nice indeed. I hope you carry the green/black elements to some of the other widgets in the theme.
Personally, I don't really like the "hidden items expander" or the "quicklaunch more button" on the taskbar though, too much contrast (and too large) for such a seldom used buttons, IMHO.
I do like the Start button being at the edge of the screen. Fitts' Law, and all that!
As for the font, I would like to see this in Verdana 7 (looks fantastic with ClearType switched off).
Interesting theme!