This is a very large smiley pack I made by special request for Pidgin that utilizes a common set of smilies seen on forums, plus a few extras for fun. Its NOT for the faint of heart, or faint of computer, and I cannot guarantee it won't crash your Pidgin.
READ ALL OF THIS BEFORE TRYING TO LOAD IT:
If your computer is low on resources, you might be wary before trying this one. There are 176 smilies, so it's quite large.
For those still wanting to give it a go, drag the tar.gz to the Preferences --> Smiley Themes Tab to load it into Pidgin.
Here is what I found out in testing it (Ubuntu 8:10 Intrepid Ibex):
It's large, so Pidgin will crash if you change smiley themes on the fly. CLOSE ALL YOUR CONVOS BEFORE ATTEMPTING TO LOAD IT. If Pidgin does crash on loading, open Pidgin (no convos) and go to the Smiley Themes tab in the preferences to load it again. If it stays highlighted, wait a tick, then open a convo window with the preferences window still open. If it still hasn't crashed, you were probably successful in loading it, and it shouldn't crash after that. Random crashes may still happen, but it should work after that.
Good luck, and enjoy!