I've talked to Bisqwit on topic of FBA recently, but the conversation was quite inconclusive.
Basically, unless my info is outdated, FBA is being worked on in order to add the missing rerecording features and improve functionality. The coder who has taken the task is pcc, the guy who added rerecording to Dega.
However, there is a somewhat important problem. Apparently, FBA hasn't been frozen in development. It follows MAME's progress and continually adds support for new games or improves the existing. If you visit the
official site you can see that the development goes at a steady pace.
So the problem is: which version of FBA to take as a base for adding rerecording features? This is something Bisqwit didn't decide upon. The options:
1. Old version, the one available via the emulator resource page at the main site. No support for newer games, probably some other things, and who knows what else.
2. Current version from Barry Harris's site.
3. Some future version (which?).
4. Some other version (which and why?).