I don't know if this has been posted before but thought it was cool. I recently got involved in 3d printing and wanted to use my Pi to run the software, well now we can do this. Here is a couple links that show how to install Slic3r and Printrun on the Pi.
http://entropyprojects.blogspot.it/2012/08/slic3r-on-raspberry-pi.html
http://entropyprojects.blogspot.com/2012/07/reprap-printing-from-raspberry-pi.html