Intel committed to providing the microcode updates for all affected processors by the end of the month. In the case of the affected Intel Desktop Boards, my understanding is that they are working to provide BIOS updates for as many of the boards as possible to the same schedule. While these BIOS updates will not deliver any fixes for issues reported against these various BIOS, they will provide the processor microcode updates for INTEL-SA-00088 and the Management Engine firmware updates for INTEL-SA-00086. I am not positive, but I believe that this would also provide, where applicable, the Management Engine (AMT) firmware updates for INTEL-SA-00075.
Hope this helps,