I explored this topic about six months ago. Here is what I found (which I checked / updated when looking at your question):
There is one package , I know that it is specifically / specifically designed for AOP (and which, as predictably, is associated with event monitoring / logging) --called ' r-connect .' As far as I know, not available in CRAN. At the moment, I have not used it enough to give you useful feedback. To check svn:
"svn checkout http://r-connect.googlecode.com/svn/trunk/ r-connect-read-only"
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