Julie, the cool thing about social media is its interaction and ability to grow your audience. So, you could do all sorts of things on a Facebook fan page. It's a great way to promote your articles, of course, but also you can do other things, depending on your particular goals. You could post related articles by other writers or sources in your field or that would be helpful to someone in your network, start discussions just like here in the forum, post leads to jobs, even do mini-blogging via the notes section.
For your subject, I'd suggest a twitter account, too--it's easier to get lots of followers on twitter and many twitterers are in computer careers. And, you can link your tweets to your facebook account, too. Plus, ask your twitter followers to become a fan of your Facebook page.