I'm a recent Air buyer as well. When I saw the lackluster update to the 13" MBP, I decided to get something to tide me over until a more substantial update comes along. I was offered a good deal on a six month old 2.13GHz SSD Air for $1200, so I jumped on it.
This is hands-down the best laptop I've ever owned. I've never had a computer that was such a pleasure to use. Plus, it slips right into a file pocket in my briefcase so I end up taking it with me everywhere. The only limitations I've noticed are the 2GB RAM and the 4-ish hour battery life, and I've begun to tailor my usage to work around both. I'm completely spoiled by the size and weight of this machine, I could never go back to something like my previous 15" MBP.
I may sit out this next update and wait to see what next year has in store for the Air. I'm a bit of a junkie when it comes to upgrading my gadgets, but I'll be moving to a new town for a new job soon and may not have the means for a new computer based solely on want.
That's an astounding deal--congratulations! I keep hoping I'll trip over something similar.