Ed writes:
I would like to have my watchlist publicly viewable, and I would also like to maintain (discreetly) a private, non-viewable watchlist.
Additionally, I would like to have a publicly EDITABLE watchlist: like, hey Ed please watch this page!
This can already be done. Just create a page in your userspace with links to pages that you are "publicly" watching, and click on Related Changes any time to see what pages have been edited. This is essentially a "public watchlist".
Evercat