German Pentax users community DigitalFotoNetz collected wishes for K10D firmware updates and future Pentax cameras and lenses. Here you can download this wishlist in English (PDF).
Most wishes are directed towards solution of problems which are being widely discussed across the internet lately. Such as ability to use internal flash as wireless controller, less compression for JPEG files, 16 bit RAW and “32 sec bulb” problem.
Some wishes runs counter to the solutions already implemented by Pentax. For example, dedicated ISO button, which is unnecessary since K10D (and probably all the next Pentax DSLRs) have the special shooting modes to change the ISO settings quickly or leave it to the camera to select it automatically. Also Pentax reps stated some time ago that the image sharpness is more important for them than low noise level.