Since we're all about the social networking around here, lots of us are signed up with Facebook. No longer content to just write on each other's walls or ask a Question of the Day, a few of us have started playing online games at Facebook with the other people in our networks. Some of us like cerebral games like Scrabulous, a version of the popular Scrabble board game, while others like to kick our friends' butts in Pirates vs. Ninjas.

Tech[dot]Blog has a great round-up of 20 different gaming applications you can add to your profile on Facebook. There are classic Nintendo NES games, trivia and word games, and even some virtual reality apps that let you create an aquarium of fish or adopt penguins, giraffes, turtles, and so on (what, no koalas?) Boy, have we come a long way since the days of single-player solitaire, or what?