It's not quite what I wanted, since it has male at both ends and I couldn't plug a thumb drive into it. I could get a fem-fem adapter but I'd rather have it all one in one plug.

I'm also on the hunt for a USB Male - Nokia 2mm converter. My idea is to charge the N810 from the wall via a USB power brick and also from a solar charger. Keeping one plug type means I can connect three power sources (wall, solar panel, Solio) to each of three devices (iPod, GPS data logger, N810) depending on what source is working.