The PHPCR project has an active community.
- Mailing List: http://groups.google.com/group/phpcr-users
- IRC: #jackalope on freenode.net
- Github: https://github.com/phpcr
Additionally help may be found from within the Symfony CMF community:
- Mailing List: http://groups.google.com/group/symfony-cmf-devs
- IRC: #symfony-cmf on freenode.net