Here's an interesting game (http://www.smokescreengame.com)
Called Smokescreen, its a flash game where you basically do missions in an adventure stylee (well okay, just point-and-click) where you use a series of social networking sites to stalk people and other less interesting tasks... very 'young generation' based, but quite amusing all the same. With sites such as 'Fakebook' and 'Tweetr'... and stalking a potential date... not that I'd do such a thing...
Basically it's telling the kids not to be an idiot and post all your life online... not just because people don't care, but because people will most likely steal everything off you...
As other relevance, it's also an interesting way of representing computer systems in a computer game other than replicating an entire operating system. i.e. MSN conversations are done by clicking the edit box, entering your chosen response then clicking 'Send' rather than typing everything. And web pages can be navigated, and things happen in real time also... quite a cool little system behind it...