I think RSPerl is b0rken as of now (2008-06-17, version 0.92-1).

There are a couple of things like an extraneous =cut tag mixed in with POD which disables a bunch of code in the RReferences module. It was definitely in an incomplete state when released.

I haven't been in contact with the authors yet, but it seems to me like their priority is providing access to Perl from within R, and not vice-versa.