Originally Posted by SLC Flyfishing
The flash works beautifully in wireless mode, with the caveat that you have to use the on board flash to trigger it. So if you are not comfortable with having the flash expose from your camera as well then you better buy a hot shoe adapter.
The onboard flash can be set to only trigger the remote flash, and not contribute to the exposure. See custom option "Flash in wireless mode" on the K10D.