Discussion takes place on the mailing list, formencode-discuss@lists.sf.net:
Updates to the repository are emailed to the (inaccurately named) mailing list formencode-cvs@lists.sf.net:
The repository can be checked out with:
git clone git://github.com/formencode/formencode.git
Note: the SourceForge CVS repository and svn.colorstudy.com Subversion repositories and bitbucket Mercurial repositories are out of date and no longer used.
Bugs can be reported in the github bug tracker.