Progress so far:
Almost done with the first release. Gives a page in the admin panel to see all sticky threads, and make them announcements. On the same page you can see announcements and "Denounce them". I put this on the admin page so that only administrators can do this, figured some staff might over-use it.
Once you "Announce" a sticky, it appears above the nodes on the board index and above the thread list on the forum view.