Ordered it from Vesalia
http://www.vesalia.de/e_minimig.htmThey were prompt and even double checked if I ordered the correct AC adapter for my country.
Made a case from a random metal backplate of some sort, some brass standoffs and part of a CD jewel case. Used a box cutter on the CD jewelcase to allow clearance for some of the ports so it ain't pretty. Covered up some of the stress marks/cracks I made to the plastic with the Minimig logo from the packaging. All in all, a functional albeit amateur case.
Used a 5v AC adapter from a set of cheap PC speakers.
They really do mean FAT16 only. I tried a FAT32 4gb SD card and the drive LED just blinked furiously at me. Not immediately gonna bother trying to format the 4gb card FAT16 as a 1gb card worked just fine.
Space Harrier 2 worked fine. I think James Pond 2 needed a joystick so I'll try a Sega Genesis joystick I've got lying around later.
Vesalia apparently already had the firmware that allows read AND write access to .ADF files. Thank goodness as the whole process of flashing the firmware sounded like an adventure.
It's worth it just to not have to buy a scan-doubler or real Amiga Monitor/Keyboard/Mouse. If you can live with Amiga 500 specs I fully recommend picking up a Minimig. Oh, yeah, and have enough Tinkerer in you to make your own case.