Julia looks very promising for fast and syntax-sane computation (e.g. here), but I suspect it will not be anywhere near R in terms of overall statistics workflow for some ti
There is also the XRJulia package from XR family of packages aiming to eXtend R by John Chambers (one of the creators of R). It uses a bit different approach (JSON) to transfer data between Julia and R then rJulia and similar packages.