Robert Cringely's June 8 column, Local Heroes: Could the Key to Successful Internet Television Be...PBS? suggests that PBS might be a good conduit for distributing television programming over the Internet, i.e. IPTV, for not only their own programming, but for commercial programming as well.
He suggests that PBS affiliates could establish relationships with the ISPs in their area, colocating servers at the ISPs, which would distribute the programming to the ISPs' subscribers.