The Forgotten Gem: LDAP

I keep wanting a "configuration lookup service" with the following properties:

• Optimized for a read-heavy workload (config stays the same for months).
• Hierarchical structure (by data center, by server group, by specific host if necessary).
• Queryable at any level.

From what I understand, it looks like this LDAP was practically designed for this.  But I've never seen anyone use it for anything but user accounts, which seems like kind of a waste.