Robin Good: If you are looking for a way to create RSS feeds from Google profile listings and Google+ searches, here is a working solution: Feed+ for Google Chrome.
Feed+ supports two different types of feeds:
a) Public user feeds: this turns all public messages of a selected user on Google Plus and turns it into an RSS feed. To create the feed, you either need to enter the profile ID which you find on the public profile page on Google+, or the full profile url.
b) Search results: this creates an RSS feed from a selected search term. It combines all public posts that include the search phrase.
(Alternative tool: Google Plus Feed)
Via Robin Good