Beta than nothing
Firefox extension (FF2): Save your browser tabs to A Few URLs.
A free service by Lenny Domnitser.
I made it to post several URLs into del.icio.us as one entry. You can use it however you like, though.
If you post http://some/url and http://another/url, you’ll get http://afewurls.com/http://some/url,http://another/url. The two exceptions are URLs that have a “,” (comma) or “#” (number sign)—these have special meaning, and special formatting.
Greasemonkey users: automatically open links in Firefox tabs.