The Design Observer, probably the premier design blog on the 'net, has caught the current strain of redesign fever spreading around faster than avian flu (which, frankly wouldn't be hard because avian flu appears to have been something of a media scare story, thus far anyway).
The editors say:
Our original design was humble: a default template in Moveable Type 2.6 called "Trendy." We've stuck with this design for over two years, despite many complaints that we were 1) not being designers, and 2) that reversed-out type is difficult to read. However, when we started, we were determined to focus on the content first, and the form second, and this default template has served us well.
Read all about it here: http://www.designobserver.com/archives/014932.html.