Just read about a new search engine called ChaCha on Stephen's Lighthouse.
It does search (they say it's real-time) and there are ratings / collections from various human guides on the results page.
What I really like about it is the live guide feature. You can do a search or you can click on [search guide] and chat with a "guide" (someone paid by cha cha; probably not a librarian ...) who will help you with your search and even "push" sites to you.
Shouldn't we be doing this?! I want to implement this in our database search engine! And wouldn't it be swell in federated search?! This + meebo = really innovative library service.