a) Some nitwit wasn't able to understand that there was a lot of us that wanted Apples first real laptop in several years. (Yea, I know that's harsh, but the tiny bumps on the G4 and a Rev A intel doesn't quite cut it for many of us) So they may have underestimated demand.
b) They lack some parts, which kinda correlates with a), since that would be a demand-issue.
c) They have run into problems in the production of this machine. I for one have not heard of ONE person that has seen a live MBP 17" C2D, which seems strange to me.
Anyway, same for me, shipping pushed from 7th to 14th..
Reach, where are you located?