Normally, if you click on one of the default iTunes listen links like the ones seen below, the corresponding Pagan Radio Network channel should open in your iTunes player.
Other audio programs also use this same type of streaming audio link (.pls), so don't be too surprised if a different program other than iTunes starts up when you click one of these links.
HI-FI
(broadband, cable, DSL)
LO-FI (dial-up)