Just joined R bloggers (http://www.r-bloggers.com/). I'm using R to write G-code for the milling maching. This evening (10/25/2010), I'll give a talk on this at the DC-area UseR meetup. Here's a link to the presentation: http://files.meetup.com/1503964/Using%20R%20to%20Cut%20Triangles.pdf