I just started using LookLater. Go watch the short demo. It's like del.icio.us except that you can bookmark multiple links from the same page. So, for instance, if you came to this site and you saw 4 links you wanted to explore later, del.icio.us would require that you either bookmark this page (which changes, so that isn't the best solution) or open each of those 4 pages you wanted to read and bookmark them. Looklater will let you tag all 4 links from this page. I'm not sure how helpful that is in most cases, but I'm going to try it out for a few weeks.