I think it'll be more along the lines of people posting on forums "have model X mobo, can someone give me a BIOS image?" and others answering their requests, not unlike what already happens today in repair forums.

Not hard to dump the BIOS from a known-good board and flash it into another; it's the usual way to recover from a flashing operation that went seriously wrong, and any decent repair shop will have the reader/writer hardware for this.

But be careful, there might be an exloit lurking inside