Today at 3 PM, I just wrapped up the launch of the Mill Valley Film Festival site:
http://mvff.com/
It's fun, they've got press releases going out like crazy. Anyway, it is fully Drupal-powered, although aside from the URLs it may be hard to tell. I relied heavily on a slightly customized version of the taxonomy-theme module, and flexinode. Figuring out the whole node-flexinode-x.tpl.php thing was a big stumbling block, but it worked out.
Each section is themed differently, and some areas such as the Tributes and Film listings contain multiple nested subpages grouped together with more themes.
The biggest success? I was evaluating Mambo & Drupal, and honestly didn't have experience with Drupal going in. I got a hint that Drupal might be more capable, and I built the site right up to today's deadline not even knowing if Drupal would be able to handle everything. As certain "pages" turned into massive indexes with tons of subpages, and as extra requirements were piled on, I just kept hoping Drupal could do it, and it did.
The biggest disappointment? Sorting of the film listings. The World films in particular is 2 or 3 pages long, and I could not find a module to sort that list alphabetically. As far as the end-user is concerned, the list is completely random. Over the weekend, I'll likely have to hack one of the .inc files to force a SORT. It would be great to have a module that was aware of the flexinode fields, so I could sort on any number of things.