Everyone’s favorite social bookmarking tool, del.icio.us, has been a handy gadget for a long time. But recently, two new additions have made it even better. You can now import bookmarks from your favorite browser. It supports Firefox, Internet Explorer, Safari, Opera, and “anything that supports the traditional Netscape bookmark file format.” You can now also mark bookmarks as private and anything imported is marked private by default. I’ve also been impressed with the URL history pages, which show you the bookmarking history of a particular link and put all the comments in one place (is this a graduate thesis in sociology waiting to happen, or what?).