In the guide it says you can get a RSS feed for watched pages, but the list of example feeds doesn't seem to include this?

I added the feed samples in this HowTo: http://community.wikidot.com/howto:be-notified-rss-feed-guide

Also, is it possible to get a RSS feed for changes to a single page (non-forum)?

First, you have to watch a page. I.d. at the bottom a page, click on history and you will see at the top right of your screen the add to watched command.
Second, go to the my account menu and click on watched pages
(http://www.wikidot.com/account:you/start/watched-changes)
Third, look for Via RSS feed in the left menu.

Also, is it possible to get a RSS feed for changes to a single page (non-forum)?