A lot of pages on the website still reference IRC, even though the server has been shut down for some time now. I'm slowly changing the references to point to Spark/XMPP pages. Meanwhile, any reference to IRC should be taken as outdated, and some use of Spark should be inferred.
I've updated a few pages, renamed the sub-forum, unpinned it's IRC specific threads, and updated the quick links.
There are still a few pages left to update. If something hasn't been fixed by the end of the weekend, you may assume that I either didn't notice it, or need to be reminded.