The company hasn't messed too much with the Windows 7 slate, except pushing the top chip to a 2.8GHz Intel Core i5-3427U and to swap out the 320GB 7, 200RPM shock-mounted HDD for a 500GB model.
Facebook has also garnered support for a new system-on-chip connection standard, rather affectionately named Group Hug, that would let owners swap in new mini systems from any vendor through PCI Express cards.