I have never been a fan of it. But like mentioned above, it does makes sense for Image searches. But elsewhere, I don't think it's appropriate. A friend of mine fancies tumblr for the infinite scrolling (well, it's sort of something you need to do manually) - but there's no page 2 on the dashboard there. Sadly, the little netbook she's using couldn't handle it and had the browser crashed. Not so fancy.