Today, at 2pm EST (Eastern Standard Time) Circuit City is offering Xbox 360 bundles on their site.

Status Update:
Xbox 360 Bundles Sold Out on Circuit City
2:27pm EST, Looks like CC is overloaded a bit, when you get the link in the browser remove the 2 in the www2 and hit enter to try other server.
2:20pm EST, Add to Cart Buttons enabled on Xbox 360 Bundles! Let's see how fast they sell out
2:15pm EST, I do not see the buy buttons enabled on the Xbox 360 offers on Circuit City. Not sure what is going on.

As reported on November 14th, when Circuit City started to make waves with their slightly misleading early offer of the Xbox 360, today they will take pre-orders for Xbox 360 bundles online.
I am not sure how many Xbox 360 consoles Circuit City will have available. Other online stores like Amazon or GameStop already stopped taking pre-orders a while ago.
Gamestop even says on their Xbox 360 order page that the Xbox 360 might not ship until early 2006, because of high demand.

So potentially, this could be great opportunity to get a Xbox 360 without queuing and camping coming Tuesday.

Circuit City offers two premium Xbox 360 bundles starting at $589.95 and two Xbox 360 core bundles starting at $489.95.