I still have some monitoring set up from when I scored my Xbox 360. Everything is STILL out of stock it seems, but I just got notification that the Xbox Core Player's Bundle is in stock now at Amazon.
This is the same bundle I got last month. It's a bit pricey at $999 for the core system, but you do get 10 games.
I've also found you can return the wired controller and memory card for credit at most stores against the wireless controller and hard drive. You can also sell the games or return those for store credit as well.
Update: All gone! Although this bundle from Dell appears to be in stock. (That's the other one I ordered last month.... like I said, long story).