I was just going to check in for my flight via Manage my Reservations on nwa.com and saw a new option, a clickable "View Upgrade and Standby List". Since I already had been upgraded, I received a message "You are not on the Upgrade/Standby List for the flight(s) in your reservation." I presume that if I had not already been upgraded, I'd be able to see where I stood on the list?

Pretty neat stuff! A nice compliment to the upgrade lists in MSP.