I've been testing out the waters with the beta version of Squarespace 6.0. I'm also studying HTML5 at Lynda.com, and heaped onto that is my latest re-design of this website.
As of today, it's still not where it will eventually be. Tweak, tweak, tweak. Constantly tweaking. I think editing my website is my new hobby... when I'm not working on income producing client projects, that is. ;-)
Now that I'm thinking about it, I've had a completely different website every couple of months for years now. And this one isn't even completely redesigned yet. Yipes, with the beta version of 6, it's entirely possible I'll have a completely different website in another few months.