By Sylvain Duloutre-Oracle on Aug 01, 2011
Oracle Unified Directory (aka OUD) is an all-in-one directory solution with storage, proxy, synchronization and virtualization capabilities.
The product can be downloaded from http://www.oracle.com/technetwork/middleware/downloads/oid-11g-161194.html
The OUD documentation is live on OTN, at this URL. http://download.oracle.com/docs/cd/E22289_01
For more info, have a look at the official press release.