Keropi is using Subway USB-controller in it, which I think is most useful adapter considering current availability of Zorro-USB controllers.
I know about this shortage very well. Give me some time to finish my exam, then E3B will do something in this direction :-) We have some plans already, but not the time - mid of october this will change.
One comment: the combo KickFlash + SUBWAY is working like a charm, but an ALGOR (PRO) will be faster due to the better USB host controller chip. So: KickFlash + SUBWAY != ALGOR, but: KickFlash + SUBWAY = good choice
Michael