I don't know why it surprised me, but one of the best things about upgrading to a new unibody MacBook Pro was finding a new version of iPhoto installed on the machine. Oh, sure, I knew I could have technically upgraded iPhoto at any time: it's part of the iLife package. But I guess it just never occurred to me that Apple would spend time improving it, so I was delighted to discover how much better the new iPhoto kept untagged photos organized. I promised to keep my eye on future upgrades.
A month later, another update to iPhoto comes down the pipe, this time with facial recognition technology, which automatically searches your photos for faces, asks you to identify each one once and then easily bring up any past or future photos that feature a certain visage, no matter how dollsome or hideous.
It sounded pretty neat, but this is even better: it also works on felines. I imagine a great project here: drag in every LOLCat photo on the Internet and finally compile a definitive "Who's Who" off quasi-illiterate, cheeseburger loving doofus cats.
iPhoto's Faces recognizes cats [Maclife]