back-sql maintenance

I have been using OpenLDAP on Linux for a number of years and am now evaluating a transition towards the back-sql backend but I understand this is no longer actively maintained. Would somebody on this list be so kind as to go into some of the reasoning behind this lack of development? Is there now a better alternative for LDAP integration with an existing SQL schema? Is the methodology of back-sql seriously flawed? Is it just a lack of volunteers? I have encountered a possible bug and, having the resources, would like to help maintain this SQL backend if that is the appropriate thing to do.

Thanks, -shawn