I think an earlier poster mentioned this, but just to confim that it works for me: the easiest and cheapest (although not the shortest) option seems to be to buy an A-female to A-female gender changer and then use the cable that came with the device. As this is not a host mode cable you need to start an Xterm, become root and say:

to tell the software to work in host mode (you can set it back to otg mode in the same way later).

As the OTG spec invented the concept of switching modes, presumably someone will actually start selling a real OTG host mode cable with a micro connector and an A-female connector sometime. Until then, this works well enough for me.

Graham