Finally got my update! I had almost given up. I downloaded the seven-eighter updater and was about to flash the phone via that method. When I plugged the phone into the computer Zune launched, so I thought why not try to check for updates one last time. To my surprise, an update was finally available. I guess threatening the phone was all it took. lol
I finally got my update last night for my Rogers Lumia 900. 5 rounds of updates were needed (automatically done through Zune), but I'm finally rockin' 7.8. Loving the resizable Live Tiles and the new Cobalt Blue theme.