That'd be very cool, though I'm already satisfied when it only shows "global" announcements. To make forumhome an own entity in the whole "where to show announcement" system is probably much more work - not that I understand these things. If it is made so I have to chose whether or not to show on index, I have to be able to edit existing announcements.
Aside from that, I just want to be able to call some sort of "forumhome_announcement" template with $announcement in the forumhome template, so I can integrate the announcement title display flawlessly in my Welcome Panel thingie. Basically like in the threadlist.
Oh, and I'm running 2.2.6, FYI.