Yes, signing up on that page is supposed to give you a free copy of Linkinus (up to an including 1.1, not including 1.2, so read the fine print), the IRC client we mentioned earlier this year. The app is also now included in the MacHeist version of the MacUpdate bundle (so if you already bought that, save the free copies for someone else), and MacHeist recommends that even if you get it for free, you go ahead and purchase it anyway (to support the developers). Plus, a purchase will clear you until the next major version, not just 1.1.
Like some of you guys, I'm getting a little tired of all the hype around these Mac software bundles, so I've been trying to cut back on this kind of news. Still, free software is hard to pass up. If you've been looking for a substitute for Colloquy, this might be just what you need at a price you can't pass up.