I still don't see the benefit here (and I am speaking for me, not for the whole Ranch).
Why do you care if there is an "Message edited by: Jesper Young" on your message. You DID edit it, right? It's not like the forum software is lying.
There are several ways to prevent speling errorrs before you post your
thread - Firefix has a built in spell-check. You can write your post in a
word processor, use it's spell check, then paste it into the Ranch.
It just seems to me that it would be a lot of work to implement this for not much gain (frankly, I don't see ANY benefit to this, but again, that's just my opinion).