many forums system have the shortcut Alt + S to send the reply/new topic.

should be a good idea to have this here, better than clicking on post new topic/reply button everytime

You can use Ctrl + Enter to send a PM reply as a shortcut already.

hmm, seems its not working here, at least to reply on topics

i think he meant private messaging

oh ya lol.

but should implemeted this to topics too (on forums not mp :P)