In the debate of whether or not to use two licensed emoticon packs for the board, me and Josh decided to vectorize them together into a single pack, I have released them under GPL, you can find them on the Wiki.
http://enigma-dev.org/docs/Wiki/Calico_iconsThese icons are provided free of charge, be sure to read the license agreement for them. This page is also compromised of the icon set for drag and drop actions and for the IDE buttons.