When I click Settings > iCloud > iCloud Account on my iPad3, the Mail account under the Advanced heading shows an @me.com address that I didn't even know I had. When I click on that Mail box, a new window comes up showing my iCloud Account Information, and that same @me.com address is listed. I'd like to change that address, but it's greyed out. When I sign on to my iCloud account or use the Settings on my Mac, I don't see any email address. Any ideas?