I highly doubt Sony will be releasing a new model so soon. What would be the point if they can't produce and stock them? If May is THE date, then the 650 would have been unavailable for 2/3 of its production run.
Perhaps the Kindle sucked the oxygen out of the room for 6" Eink displays, although Amazon doesn't seem to have trouble getting them.
At this time last year Sony had some price cuts.
