Maybe a bit late to the market, but most definitely appealing, check out the AMD Ryzen ASUS ROG STRIX B350-I Gaming motherboard. A Swedish retailer, Inet has listed a new Asus Strix B350 ITX motherboard.
What's intersting is that this motherboard has a peculiar setup, check just above the PCI Express x16 slot, there is a daughterboard containing the soundcard it seems. The 17cmx17cm mobo also holds an M.2 slot with cooler. The board costs about 229$
The B350 chipset based unit can house AMD AM4 processors as well as up to 32 gigabytes of DDR4 3200 MHz (OC) DDR4. It has four SATA 6.0 Gbit/s headers and thus the two M.2 slots, you'll spot Gigabit ethernet as well as built-in wifi, and SupremeFX 8-Channel High Definition Audio.
Mini ITX ASUS ROG STRIX B350-I Gaming Motherboard