After the announcement of the SB-300 ($146.95), the Nikon SB-400 Speedlight flash is already listed as discontinued at B&H. If you need to get one, Amazon still has them in stock via third party resellers. The SB-400 is also listed as discontinued on the official Nikon Imaging website:
The rumor is that Nikon introduced the SB-300 so it can be used with the upcoming Nikon 1 V3 camera (expected to have a fully compatible flash hot shoe).
