Actually, Paul Franklin SR. invented it, but I couldn't find any pics or info about his on the web. Many country recordings coming out of Nashville use pedal dobro.
Anyway, now that I've deflected the topic, I'll just say that the Roland SRX world card has some fine pedal steel sounds, and even a few riffs played on a steel that can come in handy in certain situations. So for all you up-and-comer G70 owners who want to be pedal steel players, get the SRX-09.