It would be helpful to have conversion scripts to transform between
Rmd <-> Rrst
Rmd <-> Rnw
Rrst <-> Rnw
Shouldn't be too difficult with pandoc. I'll see what I can do.
This will be a great feature! However, I fear that adding more features tangential to knitr would make the package really bloated and hard to maintain. @yihui would have a better sense for this, but I think it might be time to start a knitrExtra that provides a wrapper around several of these features.
I agree with @ramnathv
I do not see much value in converting between these *.Rfoo/*.Rbar documents (source); I would rather converting *.foo/*.bar (output) by pandoc directly. I have #206 for this task.