Amanuel Tewolde just gave me the lowdown on his new site Otavo - it's pretty darned interesting. Otavo lies somewhere between your search history and a question and answer service like Yahoo Answers. It's in private beta right now, but you might be able to squeeze your way in (do what I do - pretend you're a popular blogger!).
On Otavo you can start a "quest" for information, just like you would on a search engine. When you find useful links, you can add them to Otavo with tags and a description. What's more, other users can join your quest and help you out. In essence, it's a collaborative web search - how cool is that? But wait, there's more! Your quest is available to future users, saving them a huge amount of time and effort. One last thing: Otavo has a bookmarklet (they call it a "floster") to help you record your findings. But unlike most bookmarklets, there's no pop-up window and a new page isn't loaded - instead, a draggable javascript window appears on the page itself. Pretty slick.