ESPNU is an online service, the only time that channel is on tv is if ESPN moves the broadcast to one of the network channels like ESPN or ESPN2 and it will still say ESPNU on the screen. There is NO ESPNU channel on tv. I went through this last year, had a Sioux party at my house and scrambled when I found out it was an online channel. If you have an Xbox, you have the channel, no matter what your tv channels are. Unless things have changed for this year, that is what I went through last year.
Good luck.
As far as everything being on ESPNU, it is, but it is tape delayed, if you look at the broadcast schedule for these games, some even say tape delayed!! Not the Sioux though....