In the middle of an attempt to explain RSS to a Facebook user (who is already uniwittingly making use of RSS feeds), this exchange cracked me up:
the_dude: I haven’t heard of those Facebook apps. Tumblr? Reddit? Digg?
engtech: Those aren’t Facebook apps. They’re different websites. You don’t have to login to Facebook to read them. They’re out there in the great wilds of the Internet. They’re outside of Facebook.
the_dude: Man, internet people are horrible spellers. What’s up with those website names?
engtech: Web 2.0 means spell check is optional.