If the new sites are to be part of the Trilogy, then this doesn't have to be any different from moving the FAQ questions from Stack Overflow to Meta Stack Overflow way back.
I do agree with Bill that the Vote to close interface would have to be tweaked and only include closely related sites. I´m sure the team can think up ways to have moderators move questions to other sites, if this is wanted.
If it turns out that this would be abused by ignorant users, then perhaps the question should be closed and 'request' posting on the new site. That way the receiving site has a say in whether the question belongs there.
Shog9's suggestion from here:
If the SO community says it doesn't
belong on SO, then it would be a bit
rude for you to override that: you're
not a SO moderator.
However, I would be in favor of a
feature that let you delete the
question from your site and
simultaneously change the close reason
to "not programming-related" on SO (in
the process unlocking the original but
leaving it closed). That would
accomplish three helpful things:
- It would get the question off of your site.
- It would allow the question to be re-opened on SO, if the people so
- It would allow the question to be deleted on SO, if the people so