Canon Rebel T2i Availability Update: In Stock
The recently announced Canon Rebel T2i is currently in stock at B&H Photo here.
It also looks like Adorama has the Rebel T2i in stock. Amazon is still showing it as a pre-order; however, that should change soon if both B&H and Adorama have it on hand.
This is the first shipment of the Rebel T2i since it was announced, so it may not last long.