libpd has moved to GitHub: https://github.com/libpd

Official Pd community, including the Pd mailing list and “Patching Circle” meatspace community events – great places to learn about Pd and test your patches on devices:
http://puredata.info/community/

Pd Anywhere community, the centralized location for discussing libpd development and patching for mobile devices, Processing, OpenFrameworks, games, and more:
http://noisepages.com/groups/pd-everywhere/

Peter Brinkmann’s blog: http://nettoyeur.noisepages.com/