ReadWriteWeb covers the release/beta of the WolframAlpha Computational Search Engine here:  http://www.readwriteweb.com/archives/wolframalpha_our_first_impressions.php.

I agree with them that this isn't a Google killer (and unless Google REALLY screws up, nothing is out there that could challenge them); however, their focus on enhancing results with automatically generated charts and graphs, as well as other features should be interesting. Of additional interest will be how they'll make any money off this venture. 

WolframAlpha launches in May. 

Just a quick hit on Cogito Monitor, a product from Expert Systems that uses semantic technology to extract meaning from consumer blogs and other media sources. Check out their sample reports, the technology looks like it would be useful for media and reputation monitoring. I'll probably see if I can get a demo; it will be interesting to learn how their products compares to some of the other solutions in the market.