there was also an FTDI based storage solution for the Comix-35. It required a modified firmware but it did work. :)
Could I be that friend? Could you be that friend who had a Commodore 64? The Acorn Atom was sold at Gladstone Electronics in Toronto. I got mine second hand from a friend with British Mom. Oddly enough I currently have 2 Acorn Atoms, a BBC Model B+, and a Master128 :) I love me some British computers. Oh and Apples, and a few Commodore machines as well. :) Currently messing around a few, on the dining room table...waiting for my Econet upgrades to arrive from UK.