So far I haven't gotten the radio to work on a server at all, so I'm guessing that there's an actual problem/bug with it in the DW20 pack.
Adding stations is easy enough, just do it like this:
Code:
S:radioStations <
"http://URL_GOES_HERE;Name of 1st Station;Blue"
"http://URL_GOES_HERE;Name of 2nd Station;Red"
>
If you station ends in m3u/pls or something similar, download it to your computer, open it in something like Notepad and copy the URL(s) from it to the openblocks config.
Anyway, I hope that it gets fixed sooner rather than later, because I'm not seeing any forge/mod errors, it's just not appearing in NEI/creative/DJ Villager's list.
EDIT: Never mind, finally got it from the DJ Villager.