Why does it look like a full frame camera (viewfinder size)? I remember at one point I received a rumor that the new built-in flash will be bigger, and will swivel - something like the SB-400. I also see a mic on top of the D5000 label.
More updates on the way. I will reveal the source later today or tomorrow - still hoping to see something more.
Update: coming to stores on May 1st, 2009.