^^ Underworld was imo not the 1st band doing a successful webcast..maybe they did it in bigger dimensions but they did not invent webcasting or made it popular - as much as I like to give credits to the boys.
I like though what Radiohead did with the web release of their latest album...people were allowed to pay as much (or little if you are a cheap skate lol) as they wanted for the CD download. That's a pretty interesting concept but I never heard if it was (besides the media effect) also a financial success.