This was in my email . . .
"Over 2 million award seats now available!
We've added more Economy Saver Award seats for travel through December 20, 2006.* Book your award travel now with over 2 million Economy Saver Award seats now available.
Redeem your miles today, as these additional Economy Saver Award seats are only available for redemption through Thursday, November 16."
I think it's pretty cool. I have booked two free saver trips on UA to Hawaii and have always been able to get the flights I wanted. You just have to plan ahead.