PR and Doco merged years ago into the User Committe. You can visit http://www.user-com.undernet.org for an expanded scope of what they do. Basically, the User Committee (or usercom) is now split up into several projects that help make Undernet a better place for users and guests.
About the missing links, well, it's something that needs to be fixed. Sorry for the inconveniences.
Enjoy your time in the Undernet