OCC has published a preview on the ASUS P7P55D Deluxe

The P7P55D Deluxe is the top board in the series of P7 boards that will be available at launch. The hierarchy, lowest to highest, is the P7P55D, P7P55D EVO and the P7P55D Deluxe, so you have a board that fits for just about everyone, each one feature packed. The Deluxe version features a build philosophy labeled Extreme Design that focuses on three key areas, Reliability, Saftey and last, but not least, Performance. This is not just a catchphrase but a way to offer more value as well as a higher performing, easier to use product. Things such as additional ESD protection, Stack Cool 3/+ with two 2oz copper layers, Xtreme Phase, T-probe and Turbo V/EVO. From the front view you can see something missing right off the bat. The northbridge, as it has been known, is no longer used as some of the functionality has been shifted to the Lynnfield processor. The traditional southbridge has been replaced by what is now known as the PCH. The back of the PCB features additional heatsinks for the 16+3 phase VRM circuit. The heatsinks are not attached with push pins but rather spring loaded screws.

ASUS P7P55D Deluxe Preview