Mini-ITX daughterboards
These "daughterboards" are compatible with the Modular Mini-itx motherboard. By matching up the Modular bard with a daughterboard you can make a system very similar to the MII 10000, or have a board which has 2 serial ports, or an extra Ethernet port. Each daughterboards has a compatible I/O shield.
The combination makes for an exceptional value, and versatility.