If your referring to post #26 by Joewin, it can....be charged by USB wall charger and deliver USB power....Just not at the same time... I have one. Most economical solution..

In addition to the common USB wall charger, I plan to charge it on bike with this:

http://www.thinkbiologic.com/products/reecharge-dynamo-kit

I have the wheel dynamo and the recharge ($25) just need to cut off the plug and wire a female usb a to the end and figure a way to keep it waterproof.