I just got the Plantronics Discovery 925 bluetooth headset for my iPhone 3G. All seems great so far. The headset comes with a USB charging cable and the manual says to hook it up to a computer, but none of the warnings say anything about hooking it up to a dedicated USB charger like the iPhone's. Has anyone charged their 925 on the iPhone's charger? It would be great to not have to lug around two power bricks.