Forum OpenACS Q&A: Response to Trying to catch up....Help?
However, if you have legacy stuff using Frontbase and want to make that stuff work with OpenACS in some fashion, if you have or can write an AOLserver database driver for Frontbase, then you could probably make that work. I don't think any such driver exists for FrontBase, but if Frontbase supports ODBC, you might be able to use one of the AOLserver ODBC drivers instead. But, since it doesn't sound like you have any large amount of legacy code requiring Frontbase, you'd probably be better served by simply switching to Postgres ASAP. (And I know nothing about Frontbase, but I'd bet that Postgres is a better rdbms, anyway.)