Sorry the live selection didn't have what you were looking for. Maybe you can try checking the user-submitted playlists in the Video On Demand section :)
Are you talking about the on demand or live radio? I actually verified all the radio links tonight (and added some more live ones). A lot of the live radio channels do use m3u playlist files. If you choose "Open," they should play fine over Edge / 3G / Wifi, and through RIM servers, through APN, or through Hotspot (wifi only) settings. According to your profile, you're using the 9700, just as I am, so they shouldn't be a problem. What network are you on? Have you ever been able to open m3u files?
Thanks for taking the time to post. I'm sure we can figure out what's stopping things from working at your end.