We've been working on an iPython-notebook-like system for R, called RCloud: http://github.com/cscheid/rcloud http://github.com/cscheid/rcloud. It's not nearly a

We've been working on an iPython-notebook-like system for R, called RCloud: http://github.com/cscheid/rcloud http://github.com/cscheid/rcloud. It's not nearly as full-featured as you want, and still very heavily in development. Still, it does R-to-Javascript RPC (and back), allows you to develop and share your R scripts directly in a browser, and provides a rudimentary way of doing interactive Javascript plotting (so you can use write code that uses d3 to visualize R data, for example).