Is there a way to make a given post added to the main blog show up on all the sub sites too?
The project I'm working on entails using the network sites to focus on different cities (Seattle, LA, New York, etc). The main site is focused on one city (DC), but the admin wants to be able to flag certain posts he makes as "national" in scope and have them show up on all the sub sites, too.
Is there a hack I can do to the templates to do this? Or, better yet, a plugin?