Yeah! Having our IGN name show there would be nice. I'd prefer it'd be in postbit though, so we wouldn't have to go to someone's profile to see their name.
It would also be useful to have our IGN not only on our profile, but also under our avatar followed by Joined, Messages, Gender. I also agree with the security check of making sure the person claiming an IGN on the forum is that person. I've seen this security check implemented on another forum