A couple of years ago everyone was hot about virtual worlds like Second Life or There.com, but it's games that you should be playing! Games both online and offline. It's probably great to walk around a virtual world and wear no clothes (tee hee) or have penises for eyes (seriously?), but give me a world with something to do and some achievements and I'll happily go right to work.
And when I say "something to do" I don't mean have sex with a unicorn you crazy perverts.