I only seem to have three Olympic channels (and HD equivalents) on my Freeview - BBC1/BBC1 HD, BBC3/BBC HD and "301" (which is basically the Red Button channel, I think).
You'd have thought all BBC channels should be available on Freeview. I'm probably doing something wrong.... :?
Doesn't really matter that much, I'm primarily interested in the "main" sports like athletics, swimming, cycling, boxing and they're (mostly) on the channels I have available.