The first step is to register for an account or log in. Once you do that, you'll see a "Post!" link in the blue toolbar at the top of the page.
Select Article and type or paste in your news. Be sure to select or type in as many keywords as are relevant to the post (these will put a link to your article on relevant Universal Hub index pages and in RSS feeds). When done, hit Submit. Your post will go into a queue. An editor will take a look and, if it's of broad interest, will add it to the home page.