I've flown a "few" times with a bike. The experience can be anything from seemless, to nightmarish. Personally, I'd love to be able to ride to and from the airport everytime I fly somewhere. Get to the airport, take the bike apart and pack it, get where I'm going, grab the bike from the baggage claim, build it ride away. Obviously idealistic, but for many of my travels this could work just fine. No rentals, or waiting for a shuttle, etc. It's also a great way to see the city you are visiting.
I read this morning on Bikeportland.org that the PDX airport is toying with the notion of providing a bicycle assembly area for travellers.
Thats pretty rad!