I've had both the old white keyboard and this aluminum one. I'm not positive which one I like better, as they are both excellent keyboards, but the white one is definitely easier to clean. The aluminum one doesn't get things stuck in between the keys, but as soon as you spill things on it you're done.
It was recommended to me that I dishwash the keyboard, but as whoever spilled on it didn't say anything or clean it up, and let it sit and soak for who knows how long, there was little chance that it would be revived.
On my old blog is a semi-detailed account of how I managed to get my iMac upgraded for free by Applecare. Sometime in the future I will post a more revealing version of it, as it's a good story. You guys would love it.
Thanks for reading my blog, and best wishes to all of you.