"Follow Any Google+ Account Using RSS"

From The Next Web:

While Google is yet to provide an official API for Google+, enterprising developers have taken matters into their own hands with everything from a statistics service to a media player plugin already available for the nascent social project. Now comes an unofficial solution for something a lot of users have been hoping would arrive – RSS RSS and/or  ATOM feeds.

PlusFeed is a simple service that provides an RSS ATOM feed of any Google+ user’s public posts. Simply find the unique number at the end of their profile URL, and then add it to the PlusFeeds URL.

The report that’s linked above has been updated and now reports that an ATOM feed (not an RSS feed) is created. Since most aggregators can easily handle both ATOM and RSS this change should only be a technicality for most users.