I've been thinking about what we could add to it to make it a little different. Like for S2 players a requirement being an alien abduction (actual abduction not insim alien pregnancy) somewhere along x generations, and for S3.... have a ghost baby? It sounds simple enough in the wiki... you just pursue the ghosts found in the cemeteries like a regular living person.
I'm sure S2 players would probably use insim to age them up faster, and I believe S3 players can if they use awesome mod or that story progression thing (neither of which I do), but people would be encouraged to actually play it out.
In the meantime, Cadoc is testing a bigger and longer challenge (though could even be a contest depending on how you choose to look at it) in her own game we've been brainstorming the last couple days.