If you want this alerts platform, you can now download the public beta. In my case, this took a while, because it needed a newer version of .net than I had. I found its news ticker annoying.
If you want to make it easy for Particls users to express interest in your blog or other web site, you can embed some provided code. In fact, that’s what I’ve done in this post.
Think a smart RSS reader that scrolls on your screen, advises Duncan at Techcrunch, rather aptly. I don’t think it’ll be scrolling across my screen for much longer.