If anyone wants to see a detailed example of 2007 flying, check out this thread, post #6.
http://flyertalk.com/forum/showthread.php?t=653646
As you can see, I'm sitting at 80% upgrades (24/30, including 2 EUAs I already have for Thursday) on NW non-CRJ domestic segments this year. At this rate, I'll have enough guarantee miles for a PerkSaver domestic by the end of 2007.