I came across MiniX versions with different internals. Some have Allwinner A20 (dual-core) and some have A10S.
Interesting also is that some of the versions now seem to have mini HDMI instead of full and a headphone port added (because of the smaller HDMI plug).
There are some reports that these devices can be flashed with the 0202 firmware (1.6) I have put on the firmware page.
Please report any problems (as always on your own risk).