Worked out why the private L4D servers weren't working properly. There are now 3 private left4dead servers running (as well as 9 public ones as advertising) - only people in the nervousENERGY steam group should be able to start a lobby on them. Once the game starts, as usual, anyone at all can join, but there's not much I can do about that

If we need more, I can adjust the mix of private to public, but that involves waiting until they are all empty, so it can take 2 hours or more to do.
If people want custom campaigns uploaded, poke me / ryan / fruitbat / lifeless