While this will be nice, I really think that it may take to much work, especially with a lot of members that resigned way back. This is really just a necessity, but if you are willing to put the work into it, and work with Donkie on it, It will be a nice addition to forums.
It's just a simple forum group that would need to be added. No special permissions or anything, just a group to add to staff who left under good conditions. I wouldn't bother trying to remember all of the previous staff so just recent ones then from here on would do just fine.
That's a great idea. I think this should suffice if we are going to implement an ex-staff list in he forums. Good thinking!