Ok, so how about this: all of us potential Spartaci can make our ideal introductory adventure, as a kind of starter-pack to show how awesome each of our own ideas are, as well as to help new players and showcase the flexibility of RMU? You could adapt RMU's rules to your setting however you please. Aim for just a simple, one-session adventure. Ideally, you would also include pregenerated characters, so players can jump right into RMU and start playing.
ICE might even pick some of them to feature on its website or newsletter -- a kind of 'starter pack of the month' -- for new players.
I personally have long intended to clean up my hastily written introductory adventure (set in the Zor wastes of Kulthea) for this purpose too, so this will give me a chance to do that.