I don't mind paying for important plugin :) about shoutbox, I think it will be similar to thoughts on wedge homepage? You can use it to chat or it is not the intended function?
Of course you can use it to chat, but firstly it's set up for threaded conversations and secondly it's mostly a 1-on-1 conversation held in public, if that makes sense. It is, essentially, a miniature version of Twitter held on the site.
For at least one site I run myself, it would be far from suitable. I run a site that discusses specific software development, and having something that is essentially a private chatroom is much more effective for me; if thoughts were to reload via AJAX and be continuously updated, I might be persuaded to use that instead, but as it stands, I'd much, much rather make use of a dedicated shoutbox facility where I could chat with other forum members 'live' and have it be 'everyone chats here, posting to the same wall', such as it is. Think IRC, but tied directly to the forum rather than running an IRC server.
A tournament system sounds very interesting.
I did write one (tournaments / raids) for SMF. Should be interesting to rewrite it for Wedge. Looking forward to it.
I wasn't actually aware that anyone had completed one for SMF, at least not to the point of being sufficiently completed so as to be usable, though I saw multiple people attempt to start one.