Yep, same here... just noticed on my Order Status page on Dell that they've shipped my camera a week earlier than estimated. Well, actually, two weeks later than FIRST estimated, but a week earlier than estimated more recently. Whew!
Guess they got a huge batch in, 'cause on the dpreview (photography) boards, a whole slew of people recently expressed their excitement about Dell shipping their S400s.
Weird thing, though (and I hope I shouldn't be alarmed) is that the UPS tracking number Dell reported to me is not recognized by UPS. Perhaps Dell just sent off the package to UPS yesterday (Friday) and it won't actually register at UPS until Monday? Hmm.