wolfram alpha for iphone

TUAW brings word that Wolfram|Alpha, the revolutionary computational engine from the creator of Mathmatica, now has an iPhone (and iPod touch) optimized version available via http://www.wolframalpha.com/iphone.

Confession: aside from typing in "are you Skynet" and "do my taxes" I'm not quite sure how to use this new beastie, but if you're smart enough to query up an answer to "what's the second coolest smartphone, BlackBerry or Palm Pre?", let us know your results!