Just found that the RSS/Atom news reader software NetNewsWire Lite (and NetNewsWire), by Newsgator, now have a sync feature that can be linked to an online account with an web-based RSS aggregator called ‘NewsGator Online‘.

This means that if you subscribe to a new feed at work, it will also appear at home, and if you have read an article at work, it will be marked as read at home. Plus; if your not at home or at work (or any other machine with the software installed), you can use the online reader.