String Theory MUX has a Livejournal Community located over at http://community.livejournal.com/stringtheorymux/ for people who want to use their LJ accounts to keep track of important game-related announcements, or just want to discuss stuff related to String Theory and Heroes in general. While we welcome in-character journals as well, we ask that you don't post IC entries to the LJ community; keep that stuff on the journal itself! Feel free to join the community using your character journal or your personal journal — just be sure to keep all community discussion OOC.
If you'd like to participate in this aspect of the game but don't know the first thing about Livejournal, staff will be more than happy to help walk you through the account creation and setup process. Just ask. :)
Links to In-Character Journals