I was all giddy when Wolfram|Alpha demo'ed back in May. The search engine, a fact engine, is filled with so much information and the results are provided in such great detail that this is one of the most, if not the most, useful publicly accessible fact engines available. As you can tell, I am a huge fan. Like I said then, it does not replace a Google but I know when to go to Wolfram and use it for specific queries.
Bing finally officially announced a deal with them where they are syndicating Wolfram|Alpha's data in their own search results. I personally do not see it live yet but here is a picture of how it might work:
I think Google should sign up with Wolfram as well. :)