I may be slow to take advantage of this, but I have been having a really good time "friend-ing" composers on Facebook. I think it is really awesome that we can connect with the best composers of our time like this! It is so cool to check my news feed, and see updates from Steven Stucky and Aaron Jay Kernis!
Here's just a few of the established composers that I am "friends" with on the Book-of-Faces:
Ricky Ian Gordon
John Luther Adams
Additionally, I "like" Aaron Jay Kernis and John Adams, and get really interesting feeds from them. I know that this may not be as cool to someone else, but it really makes me happy!