Module or method for grabbing content from an external site?

I'm interested in being able to grab content from an external site and embedding it into a node in a separate site.

Here's the deal: I have one Drupal site that is the main site for a department. I have lots of other Drupal sites for subsidiary programs. Sometimes, I'm going to want to grab content from the main site to display in the other sites so that when the information changes on the main site, it will be changed on the subsidiary sites as well.

Here's an example:
We have an academic program that is currently accepting applications, but the deadline is March 15. We want to display this on the main site, but we also want to display it on a separate Drupal site that serves that academic program. And maybe on a third Drupal site concerning a subject area. We don't want to have to go to each of those sites to change the content so that it no longer says "Now Accepting Applications".

Is there a module, or some other method that can grab a content from one site and display it in another site? I will have control over both sites, so permission isn't a problem.

Thanks!
Shawn