package building

how can I build a packge for R.app? I run R CMD check and R CMD  
biuld, and all is fine, but I get a tarball... Is it what I should  
get for OS X?

Yes.

It works as documented so if you want to build a binary you just use  
build --binary. If you want to place a binary file in a repository,  
you should rename it to package_version.tgz, though.

Cheers,
Simon