For reference, stackoverflow.com and reddit.com give a banner on the top of the screen that is sort of a faq for first time visitors. It seems like a reasonabl

For reference, stackoverflow.com and reddit.com give a banner on the top of the screen that is sort of a faq for first time visitors. It seems like a reasonable thing to add to this site - tell people who've never been to your site about it, while not mucking things up for repeat visitors.