Directory Server Enterprise Edition (DSEE) 6.2 documentation is now available at http://docs.sun.com/coll/1224.3.
DSEE 6.2 is a part of Java Enterprise Edition 5 U1 and also avaiable as a zip distribution.
For all the supported platforms and new features, check out the DSEE 6.2 Release Notes at http://docs.sun.com/doc/820-2487.