Welcome to the Reiser4 Wiki, the Wiki for users and developers of the ReiserFS and Reiser4 filesystems.
For now, most of the documentation is just a snapshot of the old Namesys site (archive.org, 2007-09-29).
There was also a Reiser4 Wiki (archive.org, 2007-07-06) once on pub.namesys.com.
From Reiser4 FS Wiki
There is an IRC channel for reiser4 and reiserfs discussion on OFTC:
#reiser4 on irc.oftc.net