Also the 3-4 weeks is for CTO, not retail. I would imagine Apple has a separate production line and allocation system for 3rd party resellers and distributors. They'll probably be getting stock sooner than 3-4 weeks.
That's what I'm hoping for. I'm going to be stoked whenever this thing arrives, but the sooner the better. My 2006 MBP is beyond being on its last leg...missing keys and heats up to Weber Grill-tempuratures causing pinwheel for hours on end. Omission of Super Drive didn't even cross my mind, as my drive ceased to work in '09.