I think it depends on when you are making the reservation for.
You cannot use any Kidani points to complete any reservation before Kidani opens in May
(It would not be fair for the owner of another resort if you could use your Kidani points in April, if the owner of the other resort could not make the same reservation in your Kidani in April. The points would be out of balance, and the system works on there being even "trades")
Ah, yes, this makes sense. So if my reservation was after May, I could likely put down a ton of points at SSR (all my developer points as well as however many AKV points I wanted.) Forgot about that May 1 thing for a second, even though I have it written down right in front of my face on this big ol' stack of papers!
I just did this. I booked a 7 night stay at AKV for Feb. 2009 using all of my developer points and some of my points. It was no trouble at all. The only thing is the CM had to switch to another screen to see how many developer points I had. Also, the ressie does not show up on the DVC member website and it takes a few days longer to get the confirmation in the mail. But, I knew the ressie was confirmed because I called back about two days later.