Though I’m not sure Google will use this one for external PR, it’s pretty funny, and includes a tour of many Google features (Calendar, Base, Maps, Alerts etc) in the pursuit of one goal:
This article is about using the many Google sites and applications to get yourself a girl and get yourself laid. In it we’re going to use a guy called Johnny McCool. Johnny is a 22 year old Internet nerd. He works as a programmer with some megacorp, went straight from the computer labs in college to the cubicle farm. He needs to get out more and he needs a girlfriend.
(Thanks to Cory J.)