I was just featured in the article How to Travel with your Pet by Air --link removed-- (see below for working link) . As you can see, I perfer my cardboard box to a cat carrier, but otherwise this article has lots of good information about taking your cat (or dog...I guess) on an airplane. There is even lots of airline specific info (like prices, health certificate requirements, carrier requirements, etc.) if you scroll all the way down.
I'm an avid traveler, so I know a good article when I see it! If you're thinking about flying with your cat, you should check this out. I made my human read it too.