So, I came to thinking how difficult it is if you have 2 people or more running something like a Graphic shop. Since whoever posted it is the only one who can edit it. What if you could add certain people to the thread so they can edit it as well. As a mod would edit someone's thread and it would said "Last edited by catcherpro on March 5th, 2012 at 8:15" Or what not. This way if you are doing a project or having multiple people showing off what they are trading and it all be in one thread you could do it this way :)
Note: This would only be the original Thread. The other person could only edit that first post only.

Hmm..I think it have been suggested by..Joey Before? I think so.