Computational Knowledge Engine...

[K.L. Davis]

wolframalpha.com (http://wolframalpha.com)

Pretty cool. Google finds relevant material to research for an answer... this is pretty good about finding the answer.

Caveats: It can only find an answer if one exists... and it is really geeky.

[ToddG]

http://9x19mm.com/photoalbum/albums/userpics/angels.jpg

[-Wes-]

I typed in "1 peck", as in "Peter Piper picked a peck of pickled peppers", and it listed all the unit conversions of a peck.

[dookie1481]

The semantic web, coming soon to a web browser near you.

[pacifico]

Ask it what the meaning of life is. There are a bunch of cool little easter eggs - I just wish it would calculate ballistics a la BulletFlight, etc.

[Littlelebowski]

The semantic web, coming soon to a web browser near you.

Does this use RDF or OWL?!

[Nathan_Bell]

Non-mechanical weenies.
Asked it "how do I calculate compression ratio" and it tries to get me into statistics.
Put in a tire size and it was REALY confused:D