Matt's not on Facebook or MySpace or Reddit or Digg or Delicious or whatever hipsters are using these days. He's on Twitter, but he doesn't even use the service often. He does use StumbleUpon, I-Am-Bored, TV Tropes, Adocu, Vimeo, FictionPress, myVidster, Flickr, and YouTube.
on iPhone, iPad, AppleTV, PC. It's free.