I think double click is not the way to go, the area is too big on a page. Clicking on edit in the post to inline edit is more than reasonable in my opinion.
for editing the title while in the forum view it would be a cool feature since it saves you a click im not sure about editing the post itself because its already one click away.
Yes, but my feedback was about the double click in a post to edit it inline.
Editing thread titles and other inline moderating is disabled for members on this site it seems, maybe I can ask Kier/Mike to post a short youtube video demonstrating it. It's pretty nifty.