Mine shipped this evening via UPS Second Day Air from CDW. I should have it Thursday. It's the standard retail configuration; nothing CTO.
I find it funny that I was reading this thread earlier, and called my rep to ask the status. He said Apple shipped them 230+ units on Saturday, and that they should arrive later in the week, in which case mine would ship at that point. But, I came home and checked my order status, only to find it in fact had shipped, so I guess they got there earlier, or perhaps there was an earlier shipment that my rep's computer didn't show.
Because it's a corporate account (but a personal purchase), and because of our size, CDW, in the past, has had Apple drop-ship equipment to us, individually, and by the pallet, and bypass CDW's warehouse entirely. That may have happened here.
In any case, I was the first backorder CDW had for the Quad. My rep placed the order before CDW had the proper part number in their system, and then changed it once it was official. If any one else reading ordered from CDW, yours should be on the way soon.
Once it arrives, I have quite a bit to put inside it before it vanishes under my desk. If anyone wants pictures, or anything else, just let me know. I'll be happy to oblige.
For the sake of benchmarks, the machine is due to receive 16GB of RAM, 2 Hitachi 7K500 hard drives, and an additional NVIDIA 6600 card, which hasn't yet shipped (but is due to ship from CDW later this week). [The 6600s will be replaced, at some point, by two 7800GT cards once Apple makes them available as a standalone option. My rep at CDW confirmed the part number, and according to his Apple rep, Apple is waiting to clear the backlog on CTO orders before making it available as an upgrade kit.] The RAM and drives will be installed before any benchmarking.
One question - for those in the US reading who may have received theirs: I've heard lots of grumblings about the power supply and current draw. Is the plug a standard US plug? Or does it have the 'notch' for 20A outlets only?