Hi!
I've been really focused on buying a Nikon D200, their great flash system one of the biggest reasons. The ability to control an external flash with the internal one is great.
Now my eyes have opened for the Pentax K10D which seems like a really good camera at a very good price. The only worry I have is with the flash system.

How good is the pentax flash system (P-TTL). Does it give as good exposures as Nikon's (i-TTL). I have used canon's flash system and I'm not to happy with it. How does Pentax compare?
One thing which I'm really wondering about is the ability for wireless control over external flashes with the K10D. Does anyone know for sure how it works, will I be able to control an external flash with the internal one or do I have to have two flash units?

Also, can I put the flashes in groups and control the strengths from the camera position (either from the camera or a dedicated flash unit mounted on the camera) or do I have to run around to the individual flashes?

Also, how expensive is a P-TTL cable. Canon charges a ridiculous amount of money for this (one of the reasons why I'm not buying a canon).

Thanks!