Save the penguins, take a bus

The American Bus Association is doing an interesting promotion touting the industry as being "green"—and saving some penguins in the process (click to ABA's home page, then on the penguin headline to download the pdf for the full brochure). I don't know if it would persuade anyone to bus over fly to go to your meeting, but it does make me wonder if there are interesting ways you could tie your meeting promotions into some of the more popular social causes.