I like the idea of announcing to IRC, because I already use IRC, but I also think this is something different than what this thread was originally about:
[..] a simple program, which would be hidden in systray checking master.megaglest.org website for new games and notify somehow if any new appears.
I don't see how publishing to an IRC channel would offer this.
Of course you could write a bot which announces servers to IRC, and a cross platform client application which connects to IRC and uses whatever the window manager provides to create notifications based on what is published in a given channel. But this seems more complicated than an RSS reader OR custom HTTP client which just takes output from a website and creates notifications out of this. The IRC variant would also depend on availability and proper operation of two, not just one service.
So I think having an IRC bot could be nice - but in addition to what is being discussed here.