I use Facebook so infrequently these days (after an initial burst of activity when a bunch of people I know hopped on board around the same time) that I'm not even sure how to properly point you to this Silverlight based Facebook SimCity-like app called...

My City

If this link doesn't take you there after you login to Facebook, search for "My City" to find the app. I've been adding one resident per day for the past couple of days to learn more about what this app does. So far, it doesn't do much. But, like a simple freshwater aquarium, it doesn't seem to need much maintenace. And, it is kind of interesting to see the small changes in the city as it grows one resident at a time. It looks like it grows faster if you have Facebook friends add citizens to the city. But, I haven't asked anyone to do that yet.

As an old SimCity fan (I used to play it several times a week back in the, hmm, early 1990s?), it has just enough to hold my interest and have me login to Facebook once a day.