RSS, if I get the general concept right, works best when you have a bunch of discrete objects posted on a web page. Periodically, you add an item to the set. The RSS feed (which is linked in the code on the page) provides a channel to the RSS readers or aggregators. It is on these RSS readers that you are alerted to the change.
The most productive areas that seem to be RSS content providers are Blogs and News sites.
What about Google Docs? Can they be a source of information?
Searching on "Google Docs RSS" does give a hint that it can be done. But so far, no luck.
I do not know if it is me or them....