Not for static websites, but I've definitely done very similar with Knitr for repeatable analyses in R (except for autogenerating the makefile). I create R scripts, markdown templates, database extract jobs, and even take care of sending the analysis results via email. I've left the job where I was responsible for those reports, but they're still in use with a distribution list that goes up to the SVP level at Amazon, so apparently they've been pretty successful.