Hey, EKB! I'm not Graf, but I am working on L4E. There are links in my sig to the group and the forum, the main wiki page is
here.
We'd love to have more people involved (that's whole point of a shared game!

). If you have any specific questions, you can ask them here or in our forum.
As for the basics, a living game features many characters all adventuring in the same setting, and the DMs and players developing the setting as they go. There's a central tavern where PC's rest between adventures, and look for new leads and new companions for the next adventure. You keep running the same character, even though from your first adventure to the second you might be in a completely different group with a different DM.