I need this ebuild for gparted. I'll be probably making the ebuild myself and tacking it onto this bug. :)
name correct (progsreiserfs), and it turns out that the "official" homepage is actually here: http://reiserfs.osdn.org.ua/
progsreiserfs is apparently hard masked... I won't do any more work on this until that changes.
Resolved, we'll deal with this later, if progsreiserfs ever stabilizes.