We have all see the changes over the last year. In both the Intel and nVidia line, PCIe/PCI is phasing out AGP/PCI. With that change, the expected next step would be the mATX motherboards to follow suite.
Interesting enough, the first motherboard I get to test out in the mATX arena is an nForce4 AMD based motherboard.
Last year I had done a review on an Intel based solution from a little known manufacturer (in the motherboard space anyway) called Foxconn. It appears they have re-branded themselves as WinFast. Although Foxconn (therefore WinFast) has been in the tech industry for years, they only have recently started producing the entire motherboard.
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Review:
Viperlair