Looks great! Can't tell anything about the content really... but for the site itself:

- I like the merged signup/in

- The "try customizing this page" is a bit technical and it's far enough from the following text that I didn't think they were related

- I find the constantly changing faces distracting... maybe a smoother and/or longer transition could help?

- After clicking on one of the guides, I got the top bar and a white page - the main image took so long to load that I thought the page broke. This may just happen on slow connections. (I could scroll down already, but wouldn't know that without looking at the scroll bar)

- The footer with about / story / blog / legal links is not available on the front page - on purpose?