+1 to this dude.Mintyboost
Sanyo actually markets such a device under the Eneloop brand. Model KBC-E1S and it comes with 2xAA Eneloops. I believe this one is discontinued and in its place two lithium ion based power packs.Basically, I am looking for a power package uses AA (eneloop) batteries, and the pack outputs to a USB plug, so that I can charge USB devices with it. Such device exists?