I haven't seen this mod anywhere else, I use the legacy post bit for forums, but prefer the horizontal for the pm system. On my 3.8 forum I added a conditional to the postbit template. It would be handy if there was a mod that could be used to select postbit styles. In fact a scaled down postbit would prolly work for pm's...a small avatar, username, but not all the other info that is hooked into the userinfo area.