Gamasutra is running and interesting story about the biggest browser-based game sites where we can learn some pretty amazing numbers measured by ComScore such as "Total player time with browser-based online games increased 42 percent in 2008"... interesting!
The web is an immense source of information. You can learn, read, listen or watch just about anything. But let's not forget what we, humans, tend to do on our free time: we love to play! We just play with everything: gazillions of games have been created, both material or immaterial such as computer games. Many devices have been exploited and engineered for the sole purpose of entertaining people. And just when you thought this should be enough, someone had the idea of putting a game in your Favicon. Brilliant!