Pentax Japan has listed all available accessories for K10D camera (auto translated). There are D-BG2 battery grip, AF540FGZ and AF360FGZ flashguns (the only two models that could work in P-TTL mode), Remote control F, O-ME53 eye cup magnifier, cable release switch CS-205, D-LI50 battery and dedicated charger (the same as Minolta NP-400 or compatible), three focusing screens: standard one (LF-80), LL-80 – similar to the LF-80 focusing screen but also features division lines that correspond to the rule of thirds and marks to center your subject, and cross hair LI-80.
All accessories except for flashes, remote and cable release switches will be available November 30th. Also Stereo Adapter D Set with 3D image viewer scheduled. This interesting accessory dedicated to produce 3D images with one shot. You can mount it on any lens covering 50mm field of view in 35mm terms (49mm to 52mm step up ring required to mount it on the 49mm filter diameter lens).