Yep.. and its interesting how they all use the original code from Mike Foster over at
Crossbrowser.com to code their pages...
In fact, I like the one you listed here:
CSS layouts: liquid, fluid, elastic, flexible... it's almost identicle to Sitepoint.com technique that was first demostrated here:
Collapsible 3-Column Layout
I'm still a big fan of that 'Dockable Nav' technique... VERY Cool.