Blue Dot is a combination of a social bookmarking and social networking service. If you’ve wondered what “Dot this” means on a Web page, this is it.

Blue Dot has received quite favorable coverage from both TechCrunch and Robert Scoble at PodTech, due at least in part to its ease of use, as you don’t have to sign in or register to use it immediately.

It’s possible to import your del.icio.us bookmarks (check out this post on the Blue Dot blog), choose which bookmarks to make public or private and use a widget to syndicate the feed for your bookmarks, all within a smooth, relatively attractive user interface.

Dot this, anyone?