Inspired by the sexy Arduino .INO filetype icon, I made this because I was sick of looking at that little script icon for my .PDEs.
Source PSD:
http://dl.dropbox.com/u/103936/pde.psd
Mac ICNS:
http://dl.dropbox.com/u/103936/pde.icns
To replace the filetype on OSX, replace /Applications/Processing.app/Contents/Resources/pde.icns with the new one, then relaunch the Finder.
Let me know what you guys think!