My free account at MarineTraffic gives me a notification whenever Aegean Dignity arrives or departs a port, or a user submits a photo.
This makes for an interesting and narrow way to learn "what's going on in the world," a goal I used to try and satisfy by reading news.
A broader view is provided by ShipMap, which omits details of individual ships (beyond cargo type) to show global perspective of ship movements over the course of a year.