User blog comment:Meighan/New Tools to Start & Grow Your Wiki/@comment-3262681-20110805093428/@comment-4713673-20110805162806

We've heard this request from a few people, I think it's definitely a good one to consider. It's not possible to add your own icons right now, but I've got it high on the requested feature list and we'll think about adding it in with a future release.