I am going to place an order with Adafruit and Mouser TODAY- Adafruit by about 2 p.m., and Mouser by 5 p.m.
I am planning on ordering a couple of Xbee modules from Mouser, 10 Atmega328s, crystals and caps for same. I might suggest that anyone interested order a 895-TTL-232R-5V from Mouser as well- it's basically the serial port interface that the Arduino uses in cable form. That, plus the programmed chip, a crystal, and a couple of passives are all you need to make an Arduino on a breadboard. From Adafruit I'm ordering 3 Xbee breakout boards and two Arduinos, plus whatever anyone else wants.
I'll check here, on PM, and for direct messages on Twitter before I order.
Sorry for the late notice!
EDIT: I only need two or three of the 328s; I'm hoping to find buyers for more. If enough people request that I buy more than 10 I will- the next price break is at 25.