> In case it matters, what I'm seeking is the ability > to receive notification of events such as: adding > an entry, deleting an entry, modifying an entry, etc.
Try playing with the accesslog and auditlog overlay. (slapo-accesslog/slapo-auditlog man page is a good place to start.) It's unlikely to shoehorn into what you need (unless you just want to reap auditlog's file periodically), but it's probably a good place to fork for a homegrown overlay of this mindset.