I do know that Tyvek and Typar are air infiltration barriers; not moisture barriers. If you were going with a vinyl side, I'd say go with Tyvek or Typar because air will get under there. But with cedar on the outside, I think you ought to be more concerned with a moisture barrier under there. I've seen Red Rosin used on roof jobs and flooring jobs to keep moisture out, but not siding jobs. One site, Red Rosin Paper, doesn't say anything about using Red Rosin on a siding job. HOWEVER, this isn't to say that it won't do the same job as any appropriate, moisture prevention product for use w/cedar shingles/board.
If you get a chance, ctc The Cedar Bureau if you don't get an answer here, or one that's to your satisfaction. They can be e-mailed directly.