In an effort to try to build some viral buzz for its Google Latitude product, Google is encouraging people to create a custom video and e-mail it to all their friends. (That’s right, e-mail. There is no embedding option). The video shows a bunch of Googlers spreading out across San Francisco with their Latitude-enabled mobile phones.

At the end of the video, their avatars spell a message, which can be customized to say whatever you want. I made a video that says “Crunch It.”

Latitude is Google’s geo-location service. It uses your phone’s GPS, Google Maps, and Gmail contacts to broadcast your location to your contacts (or hide your location from select contacts/bosses/girlfriends).