This story says the FCC is interested in regulating VoIP [link no longer available].
FCC Chairman Powell has a point--if the Feds do nothing, some states will certainly step in and try to control the new service and/or try to tax it, leading to only one possible outcome--a mess. The states can't possibly regulate VoIP, because it's not a place-based service. Companies like Vonage and AT&T don't have to any equipment located anywhere in a state to sell VoIP service to residents, and so the notion that a state should be trying to control an out of state company is silly. Nonetheless, some states will try.
According the article, Powell is a big fan of VoIP, and wants to see it succeed. Good. If the FCC uses a light hand here and keeps the states out of it, that's entirely appropriate.