I have a hard time dealing with A Chorus Line as a movie. It came out when I was very young, and my sister and I liked it so much that my parents took us to see it in NY as our first Broadway show. Watching it now, I see how poorly made it is, and cutting Hello Twelve is a travesty. Still, it will always hold a nostalgic place in my heart...
As for iTunes, I sent them an email once complaining about the horrible categorizing that they do, but didn't even get a courtesy email back. They seem to be VERY slow adding things, and what's worse, you have to actually look through the browse function to find anything since they tend to add stuff without advertising it.
iTunes does lack many OBC recordings, but look for Bway/Movie actors and you'll find some great showtune (and other) songs. Like Judy Garland, Lena Horne or Rosemary Clooney to name a few.
Cheers!
"I've had two years to grow claws, Mother, and they're Jungle Red!" Mary Haines - The Women