I recently stumbled over a facebook-plugin for pidgin and thought I'd give it a try and build it on my fresh install of nv_105.
Downloaded both the icons and the source...
# bunzip2 pidgin-facebookchat-source-1.47.tar.bz2
# /usr/sfw/bin/gtar xvf pidgin-facebookchat-source-1.47.tar
# cd pidgin-facebookchat
# make libfacebook.so
# cp libfacebook.so /usr/lib/purple-2/
# cd /usr/lib/purple-2/
# chgrp bin libfacebook.so
Icons were easy...
# bunzip2 pidgin-facebookchat-1.47.tar.bz2
# /usr/sfw/bin/gtar xvf pidgin-facebookchat-1.47.tar
# cp ./usr/share/pixmaps/pidgin/protocols/22/facebook.png /usr/share/pixmaps/pidgin/protocols/22/
# cp ./usr/share/pixmaps/pidgin/protocols/48/facebook.png /usr/share/pixmaps/pidgin/protocols/48/
# cp ./usr/share/pixmaps/pidgin/protocols/16/facebook.png /usr/share/pixmaps/pidgin/protocols/16/
Damn. by far the easiest I've run into...