With a HT to Flyertalk on this one, and works just about same CPM both ways, this one you should think about booking back to back days as the numbers are just amazing! Take a look:
6,450MQMs at 3.6CPM
Bookable on Delta.com
DM yields a HUGE 14,514 Skymiles per CWSI.net!
A few open dates before SEPT and some after as well. I bet this will NOT LAST so book fast, book lots as you have 24 hours to cancel.