Nikon have released the follow-up to the SB900. The new more expensive SB910 is supposed to solve the problem of the SB900 overheating and shutting down, by slowing the re-cycle time when the flash head starts to heat-up. It's an improvement, but to me, it still means missing shots. So it's time to sell my SB900, but not to buy an SB910. I'll be buying another SB700.