PBS just showed a wonderful commentary about "persuasion." It's design & advertising rather than type, but worth a look if you're into it. Part of it even talked about jetblue and song. Luckily, they have a site where you can watch the show online (starting november 12th) or read more about it:

http://www.pbs.org/wgbh/pages/frontline/shows/persuaders/

(very nice looking site, too.)