The solution is powered by Superfeedr, the real-time cloud based feed parser and publisher who I have long been bullish on thanks to their support and promotion of Pubsubhubbub, a protocol behind real-time data transmission from network to network.
With Superfeedr having already proven capable of acting as the back-end for real-time RSS distribution across the Web, Ping.fm's turning to Julien Genestoux and team makes logical sense, rather than trying to reinvent the process. Now Ping.fm is much more than a massive broadcaster of status updates, but a vehicle for RSS too.
See the official announcement here: Ping.fm Provides RSS Support