there is a reiser fsck. I think fsck has the ability to find it (fsck.reiserfs or something), but I'm not sure. I also found it to be not as good at recovery as ext3. That conclusion is based on warning messages and the amount of self-reporting diagnostics indicating data was lost.

As far as I'm concerned, the biggest advantage of reiserfs -- directory filename hashing -- was lost when ext2/3 added the -O dir_index feature. I suppose some still consider "tail packing" very interesting, but with drives as large, fast, and cheap as they are these days, this benefit seems to have been marginalized.
My $0.02.