There are pages on this site, describing how to get involved and who the current development team is, and some pages of development notes.
Java.net hosts many of the DWR development resources. This includes:
A number of other sites host DWR resources:
The repository can be found at http://svn.directwebremoting.org/dwr/trunk/
No username/password required. If you have commit privileges then you will need to use https and authenticate with your username/password.
This repository replaces the old CVS repository at :pserver:guest@cvs.dev.java.net:/cvs. You can still get anonymous access using the username 'guest' with no password.