Matt wrote a review of Big Agnes Insulated Air Core Sleeping Pad - Rectangular on November 14, 2011
This is a great pad. Packs small, is lightweight (for me, at least), and didn't cost $129.95 ;). You definitely need some lung power and patience, but it's totally worth it! Also, it seems to hold air really well, only needing a couple blows before bedtime after being out all day.