Just hours ago, Wolfram|Alpha was launched. If you have not been there already, check it out! This revolutionary site was just too exiting for me not to write about it. Wolfram|Alpha essentially makes libraries and libraries of knowledge available at a click of a mouse. Wolfram|Alpha is not a search engine, it is completely different and unique. You won't know it until you try it. This definitely won't replace Google for me, since the two products solve two different issues. Nonetheless, it will definitely be useful for school stuff. I'm not sure if it has much appeal for the normal Internet users, though.

Here is a link to a demo by Wolfram himself.