April 27th is the cutoff for orders from Dodge. I ordered mine through Military sales, and was told that they would prefer to get the orders in and processed so they can make the 27 april cutoff date. I ordered mine last week and I am still waiting to hear whether or not the order was accepted by Dodge.
I also ordered the 06 instead of the 07 because I didn't want the new emissions crap on my truck, and the 5. 9L engine, and the 48RE transmission is a proven combo. I don't like the idea of being a test subject for a first year change. I am sure it will be a great truck, but I like sticking with old faithful. If for some reason you can't get your order in, you can still get what is available in stock, so you would have to look around a little harder.