Webcasters are already going off the air after the Librarian of Congress published the final fee structure for webcasting.
The main effect of the rates are that many people who have set up small Internet broadcasts that reach at most hundreds of people will have to pay the same sort of royalty rates that major radio stations that reach hundreds of thousands of people do.
Oh, and the rates are retroactive back to October 1998. A lot of people running small webcasting streams in their spare time suddenly own RIAA a big chunk of money.