As far as I can see - Debian "Sarge" / Debian "testing" / Debian GNU/Linux 3.1 - now has support both for Reiserfs [?? 3.6.19??] and Reiser4 [?? 1.0.3 ??]. There is a kernel patch against version 2.6.8 for Reiser4. Hope this helps - everyone feel free to correct me if I'm wrong :) Andy