I've been using furl.net to capture/bookmark what I've been perusing. It actually makes a snapshop and bookmarks what you were reading. It also has space for a clipping (just highlight the text you want, click the button, and it shows up in the clipping section) that furl can search through. So say you remember some piece of news you furled but not the name. Do a search and it'll go through the keywords (and I think the clipping) to find that article/website you're looking for.
My furled sites are now in the sidebar, but if you're wondering what I've furled in entirety, you can subscribe to my furl list or take a look at my furl.net site. It also comes in email and RSS format so go ahead, invade my privacy.