Very cool. Any way to do this on Windows? I’d love to use this for customer presentations and demonstrations but wouldn’t be able to show up carrying a PowerBook G4. ;-)
http://the.taoofmac.com/space/Applications/Mousepose
Mouseposé is an extremely neat way to hold your audience's attention while doing demos of any sort:

I'm sorely tempted to download it (it's free, but you have to register, which is a nuisance I'll do without) solely because I sometimes lose my mouse pointer in the 20" screen