The biggest problem Second Life faces as a communication technology is it's not as known as facebook, myspace, or twitter therefore it doesn't have as many users. Besides myspace, facebook and twitter are two new communication technologies that have become part of everyday use. Both are used by celebrities, connect people to friends and family, and even help for meeting new people. In Second Life, you are able to connect with people, however, from my experience it is difficult and seems impossible. Second Life seems to not have many users, therefore to me it kind of makes it boring since all you do is explore and take pictures.
Hopefully, in the near future it will become more popular. I cannot see it becoming as popular as facebook or twitter since those are easier to keep in touch with and meet people with.