I would like to suggest to add the functions to the BgBB to edit your posts and to quote the posts of others. I think it would be helpful for keeping track of what people say when having discussions and to soften the edges of your post be there typos, or reading it afterwards and wanting to change the way you word it, etc.
Honestly, I am surprised that this hasn't been implemented already. Or maybe it exists and I am just too dull to find it. :p