I’ve said it a few times now, and feel free to correct me if you see it differently — the problem has been that code geeks have wrapped their mind around advanced CSS layout and know how to use it well, but they’re incapable of anything beyond simple, boxy layouts. Designers haven’t had the slightest interest in figuring it out due to sketchy browser support, and far more importantly, lack of design tools. That’s why the best graphic designers are so focused on Flash — it’s intuitive to build with, has a well–built design interface, and the coding works. All the time. In every browser.
We’re hitting a turning point here, where valid CSS layout is now more than a pipe dream, it’s a legitimate way of building a site. Once designers get their mind around it and the ideas start flowing, you will begin seeing amazing things. Bet on it.
(Incidentally, there have been 8 additions to the Garden since its launch, make sure not to miss the latest)