We've added a new set of smilies to replace the old one, based on the Tango theme. You can find them here. We're using 30 of them, and to view some of the other ones, just click on the "More" button when the smiley window comes up.
If you want more smilies from that set for whatever reason, just tell me and I'll add them if they fit.
Alternatively, we are also seeking to make some Unvanquished-themed smilies. If you make one and it looks good, we can add it. They must be 24x24 and in png.