Bernard Kerr is the user experience lead on delicious at Yahoo!. I noticed something the other day about the way his bookmarks are organised that in retrospect was one of those duh! ideas. On the righthand side of the page Bernard has a tag bundle labelled actions and then a series of actions attached to the sites that Bernard had bookmarked (see below).
Something to think about, a kind of GTD for your web browsing. This goes way beyond my current occasional use of toread and blogit as tags.