How to publish to multiple wordpress sites from a single install

An article with the above title was published in September 2013 by Chris Knowles.

The article provides extensive detail on how to accomplish this worthy objective – however the background on the central ‘Push Syndication’ widget looks shaky.

It would be great if someone could re-visit this topic to see if the results for this process are now proven. Is it working well? Has been any enhancements or effective alternatives released to achieve this goal?