I've been away from the Blogosphere for so long that I didn't even realise Zeldman redesigned. I like it!
I'm also toying with the idea of tabbing for my next redesign (which is not going to happen in a long, long time but I still like to think about it). A tip from me: I don't like the way Photoshop renders rounded rectangular shapes. The corners are pixelated, last I checked (version 6 or 7). Instead, I much prefer Fireworks for designing user interface elements. Try drawing a rounded box in Fireworks and you'll see how pretty anti-aliasing can be.
Unless you're going for the pixelated, k10k look ;-)