Printerface is something I cooked up to allow me printing to my 3d printers (reprap's) with the browser. You connect a Raspberry pi to your printer and then this allows your printer to be autonomous and easily manageable from within any browser. Little video explaining the usage is on youtube: http://youtu.be/tsMdusrO6bk
sudo apt-get install python-serial python-wxgtk2.8 python-pyglet
wget https://github.com/kliment/Printrun/tarball/master
mv master pronterface_src.tar.gz
tar -xzvf pronterface_src.tar.gz
mv kliment/Printrun printrun
cd /home/pi
apt-get install node-js git
#install npm
curl https://npmjs.org/install.sh | sh
#get printerface
cd /home/pi
git clone git://github.com/w-A-L-L-e/printerface.git
#forever keeps our printerface running even if it crashes, and creates a logfile while we're at it...
sudo npm install -g forever@0.9.2
#now actually fire it up, put this line in /etc/rc.local to have it on boot
cd /home/pi/printerface && forever start printerface.js