Function hints in status bar

It would be great if function hints could pop up in the status bar as you type, like they do in the R console. For example, in R if you start typing "plot(", the bottom of the console displays the function hint "plot(x, y, ...)" so you know what the function arguments are. This might be too specific to R, but I'm sure other languages have something similar. Maybe this could be built into the Enhanced-R plugin?