If you are one of those people that loves to stick as much power into a little space as possible then Asus may have a great board for you. This is the Maximus III Genie. It is a P55 microATX board that is still part of the high-end Maximus ROG line.
There are some early pictures out of the board and it is looking to be a great package. The new Maximus III Gemie will have two x16 PCi-e slots with enough room for some decent sized GPUs for SLI or Crossfire.
The Maximus III Genie will also have 10 phase power, four DDR3 slots, 6 SATA II ports and the Supreme FX X-Fi sound codec built onto the board.
It should be a lot of performance in a small package.