Kung Fu Records: Featuring artists such as Blink 182, Apocalypse Hoboken and The Vandals in a mostly-punk rock MP3 stream.
PunkCast.com: Includes streaming 'casts of a few punk shows since 1997.
PunkRadioCast: Punk rock broadcast with live DJs.
Ska*anarchy Radio Show with Augustus: Ska and punk streaming MP3 radio station. Site has information about featured bands and the history of ska.