There are already a lot of great ideas here, is it unfortunate that they take more work than typing a couple sentences? Probably, but then, that is the problem with doing something pro-active, it requires activity . . .
How much more so making the game . . . a question for another time perhaps . . .
For now focus on gathering the resources that have presented themselves to you-
Make an irc channel for your people to gather . . .
Use this forums user list to gather email addresses of people you miss; if their email is pubic here I doubt they will mind being contacted . . .
Set a target date as a goal . . .
You have more than enough ideas (ideas are not hard to come by, implementation is the hard part) to have a splendid event, now get in the trenches and make something happen!
You need to believe you can succeed otherwise
OTHERWISE