Csound's "home page" is maintained by Richard Boulanger at http://csounds.com.
The Csound source code is maintained by John ffitch at http://www.sourceforge.net/projects/csound. Precompiled packages for some platforms also can be downloaded from that site.
A Csound mailing list exists to discuss Csound. It is run by John ffitch of Bath University, UK. To have your name put on the mailing list send an empty message to csound-subscribe@lists.bath.ac.uk. Posts sent to csound@lists.bath.ac.uk go to all subscribed members of the list.
Similarly, the Csound-devel mailing list exists to discuss Csound development. For more information on this list, go to http://lists.sourceforge.net/lists/listinfo/csound-devel. Posts sent to csound-devel@lists.sourceforge.net go to all subscribed members of the list.
Suspected bugs in the code may be entered using the bug tracking system at http://www.cs.bath.ac.uk/cgi-bin/csound.