I haven't made such a beast, yet. If you are looking for something like a desktop pet in Troll from, I don't have the skills for such a thing. (I attempted a Deviant Fella, Rude Fella, that kinda did things, mostly farted green gas clouds..and it didn't work out to well. I think it's still in the widget gallery stinking the place up) If all you want is some sort of png for OD, I might be persuaded to make one.
There is my Troll Thumping Day Countdown widget, which can be found at Skinartistry or DeviantArt. For some reason, it has sat in moderation here at WC for 6 or 7 days. They told me the counter wouldn't work, (Works for everyone else, i dunno) so I resubmitted it and it has sat. I believe Troll's may have infiltrated the Mod offices and have taken control of everything.