Dutch site Tweakers.net has a few pictures on their forum of an upcoming Socket M2 based motherboard from MSI.
The MSI K9N Platinum has a chipset from NVIDIA and supports SLI. The motherboard features support for six Serial ATA drives, four DDR2 memory modules, two PCI Express x16 graphics cards and four PCI Express x4 cards.
You can check out the pictures over here. These kind of Socket M2 motherboards will be widely available after AMD launches their new Socket M2 processors. Currently it looks like it will be a launch in early March.