Hi Ed:
FoxBin2Prg is Production ready, and AFAIK, it's the only tool that allow Diff and Merge of the generated text (tx2) files, and can regenerate the binaries from them.
The generated files are PRG style, so developers can see them as modifying a PRG (with PROc/ENDPROC structures and such), but they aren't mean to compile. Primary use is for SCM tools, but can be used seperately.
I'm actually using on production code with a 10 member team using concurrent modifications on forms and classes.
Some documentation is available on VFPx in English and Spanish, Internal messages are vailable on both languages and from version v1.19.24 a new translation to German is available too.
More info on VFPx site,
Best regards!
Fernando D. Bozzo
Madrid / Spain