Great to see this thing gathering momentum
Here's an idea: How about you start making your map now - but start small, because remember that it has to be small in order to get other people in too.
Then you can just do something like vassy said: a teleport.
Can't wait to get a new HDD so i can start maping for this thing
Here's what i've planned so far:
3 Areas separated by teleports: 1 area was to be a wormhole sequence ( a kind of an intro.. but not any more because i can't do the first map..)
Area2: Grunts, lots of combat
Area3: My take on Xen: with more combat and a few surprises
Gonna max out the Texture memory & brush entity limit and force you to a levelchange - MUHUHAHAHAHAHAHAHA!!!