Having said this, I just watched this beautiful infographic video by Shimi Cohen, and I suggest you take a look too:
Makes you think, doesn't it? I like to think that I interact with people on a real level, but the truth is I'm satisfied with facebook, and it's a problem. Every time I post, it makes other people feel like they can know what's going on in my life, when really I only post stuff that makes me look good and smart and beautiful (and that's not the real me). So while facebook is a lovely way to share, it's not an accurate reflection, and it's important to stop and remember that every once in a while (and even more than once).