I took a quick look and found a couple I like: http://basecamphq.com/tour http://basecamphq.com/tour -- Highlights each feature with a screenshot, with a link

I took a quick look and found a couple I like: http://basecamphq.com/tour http://basecamphq.com/tour -- Highlights each feature with a screenshot, with a link to a demo video. http://www.freshbooks.com/tour.php http://www.freshbooks.com/tour.php -- Screenshot only tour, but shows screenshot for each section of site, then breaks down the features in each section below.