What effects can Unusual Taunts come in? Couldn't find anything on the wiki, and the TF2 wiki hasn't been updated yet.
Looking here it seems like there's a pretty good number of taunt effects out. Names are taken off of the imgur album I found. All of these can go on any taunt, or at least those dropped off of the new crate, the Audition Reel. At the moment, any unusual taunt is going for stupid amounts of cash/buds, as you can see here.