As most Linux users I've read about ReiserFS. The wiki page about the file system is.. laconic?:
"ReiserFS was the default file system in Novell's SUSE Linux Enterprise until Novell decided to move to ext3 on October 12, 2006, two days after principal author Hans Reiser was charged with the murder of his wife."
In short: Reiser denies killing his wife, her body has not been found, the trial is set to begin in July.
Wired's Joshua Davis met him in jail. It's a strange, strange read - a mix of low-tech implementation facts and the murder case, filled with details about a bizarre life. Hans Reiser: Once a Linux Visionary, Now Accused of Murder