This might be pretty minor news for the most of you. Heck, this may not even be newsworthy to some of you at all. Everyone is aware that they can create custom channels, right? You simply type /join CustomChannelName (CustomChannelName being pretty much anything you want) and voila! You're now in that channel. If somebody else already has that created, then you've now joined their channel. (As long as there isn't a password.) There's actually a ton of things you can do in these custom channels. Like a password, you can also ban players or kick players.
But that's not really the point here. If you want to know about any of those things, you can see all the commands on Wowwiki.
The point of this is that there are certain channels where things cannot be linked. General used to be one of them (I'm not sure if this is still true) and custom channels was another. So, in the custom channel I have with my closest friends, for example, I'd have to whisper-link any item to all of them; I couldn't just put it in the custom channel. But now, linking is available in these custom channels as well. Yeah!
That is all.