Mailing list: http://www.redhat.com/mailman/listinfo/dm-devel
Gitweb: http://git.opensvc.com/?p=multipath-tools/.git
-Patchwork: http://patchwork.kernel.org/project/dm-devel/list/
Current maintainer is Christophe Varoqui <christophe.varoqui@opensvc.com>