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The official source of information about the Subversion project is, of course, the project's website at http://subversion.tigris.org/. There you can find information about getting access to the source code and participating on the discussion lists. The Subversion community always welcomes new members. If you are interested in participating in this community by contributing changes to the source code, here are some hints on how to get started.
The first step in community participation is to find a way to stay on top of the latest happenings. To do this most effectively, you will want to subscribe to the main developer discussion list (dev@subversion.tigris.org) and commit mail list (svn@subversion.tigris.org). By following these lists even loosely, you will have access to important design discussions, be able to see actual changes to Subversion source code as they occur, and be able to witness peer reviews of those changes and proposed changes. These email-based discussion lists are the primary communication media for Subversion development. See the Mailing Lists section of the website for other Subversion-related lists you might be interested in.