This is a bright and fun page. There is a lot of content, but it's got decent typography and so isn't overwhelming. There is a rotating image gallery at the top a video towards the middle, a dynamic menu, and even a Twitter feed in the right column.
The HTML is HTML5 with CSS3 features, but there aren't many HTML5 features included on this site beyond the DTD. However, I don't find this site inspiring because of the code. I am inspired by this site by how it was built — with a no-code WYSIWYG editor — Adobe Muse.
If you've been building web pages for a long time you may be inclined to scoff at web pages designed and built in 100% no-code WYSIWYG editors. But this page shows that you can create an interesting and dynamic page without needing to know any HTML or CSS.
Have you built an HTML5 site? Or do you know of one that does a great job with HTML5? Submit HTML5 site designs to be featured on this site.