It is available as an app for the iPad, iPhone, and iPod touch for a measly $1.99!
Oh, and the online version works well on both Macs and PCs as well.
If you want on or off the Mac Ping List, Freepmail me.
bump
Yea it’s a great app.
Instead of paying $1.99 for the iPhone app, couldn’t you just go to wolframalpha.com on your iPhone browser?
what a great site. thanks for sharing it.