Now I'm listening to As long as you're Mine from the musical Wicked. I have Shuffle turned on.
Oh, it's not in the radio section, it's in my playlist. 0___o Umm, let's see. I have firefox, in case it matters - Oooh, Candle in the Wind now - And, if I remember properly, I tried to play MC radio by clicking the play button on the MC Radio page. Random boxes popped up and things happened that I didn't realise, and bom, it was playing through iTunes.
Oh geez, I wish I could be a bigger help. It's really useful though, I just open it up and find it on my playlist and press play. Oh, and, so you know, I have a PC. I ended up with iTunes when I tried to update Quicktime, and found it's a really good program so I use it all the time now. But if you have a Mac, your version may be different than mine, I'm not sure how that works..
Here, I'll take a minute just now to see if I can figure out how I got the station on iTunes. I'll be right back!