OpenDRDA is a project to produce client and server libraries for the DRDA (Distributed Relational Database Architecture) protocol. The initial plan is to work on client functionality to access existing DRDA servers (such as DB2). We now have a FAQ to consult also.
There is some code implementing some DDM functions, enough to exchange server attributes with DB2 UDB 7.2 and a few other things. The code is very alpha and not useful for much beyond hacking around with.
Join the mailing list ! The code is available in CVS see the Project Page for details. There is a prealpha1 release tarball available here.
The Standard (in three parts)
A not so rosy opinionhttp://www.uniforum.org/news/html/publications/ufm/may96/standards.html
JTOpen (contains a DRDA JDBC driver in Java)