mwheinz--This is true of the previous Sony devices, but my understanding is that the new readers (350/650/950) will work differently--the AC charger that Sony is selling for their new readers plugs into the micro-usb slot on the reader, so I would imagine that other AC to micro-usb chargers will also work. Now, I don't have a new Sony (yet) so I can't verify this, but I'm sure someone will be able to verify soon!
dordale