Yep, I remember being at Best Buy sometime around the Christmas holidays, seeing a man looking over the Sony display. Would have been maybe 505 or 600 - it wasn't in the last couple of years.
He had picked up a Sony and was looking skeptically at the expensive separate charger. I couldn't help myself - I went over and whispered that the PSP chargers, even the generic ones, worked just as well and cost much less. He went on his way, searching out the PSP section!