UPDATE 12/3/09: Image scans from the Pentax 645D manual have been removed by request and as a courtesy to those involved. However, it wasn’t like this was Pentax’s best kept secret in the first place, given the Pentax 645D patent application filed in 2008.
The Pentax 645D has been in the rumor mill for a long time; however, the buzz over this camera has grown over the course of this year.
It looks like part of the camera manual has leaked online, along with rumors of an early-2010 appearance, perhaps around PMA 2010.
Rumored specs include a 39.5-megapixel sensor, and you can see from the manual scan that SD cards and the DNG raw format are in the mix.