It would be great if we could highlight a game name in a post and hit a button a bit like the link button, but one that would let us link to a game on mobygames/gamefaqs/rfgeneration/glitchwave to enable people to easily find out more about it.
It could also be a shortcut for easily embedding images of a game. I always think discussion is much richer when there are images and links to support the text.
Lastly, if a discourse plugin needs creating I’d happily volunteer to create it.