Finally, we are showing you a bit of work on the Cocoa GUI. Do not expect too much, it is just a preview. You have some nice feature yet like code and file completion, but still don't expect too much. Have a look here http://www.economia.unimi.it/R It works with R.app 1.9.0 This is a joint work with Simon (mostly his work at the moment) When we will have time, we will also write some docs on how to write your own gui for R using Cocoa, but don't expect any finished work before R 2.0.0. stefano & simon