Recently, Apple offered a free U2 album online.  Cool right?  I thought so.  Anyways, Apple said it was in your purchase list… nothing.  Nothing I did would make it show up?  Changed iTunes preferences (per Apple support forums)… no luck.  Finally, I followed the link at the bottom of the page in iTunes and it showed up!   It takes you here and now you see the album and it is downloadable!   Not as easy as Apple made it sound.