Well in theory, the content is paid for by advertisments.. so you shouldn't have to pay for it.
Just do it man, I wouldn't worry. As long as you don't intend to profit from it then I'm sure you'll be okay.
I've been holding out for a decent mp3 player with a line in so I can record radio shows more often (eg. Zane Lowe's mix-tapes)
Unfortunately Apple and Microsoft don't seem to care.