Many people I've talked to were excited to finally get their Google Wave invitation, only to realize they were all alone in the latest document collaboration system. What good is collaboration if you have no one else to work with?
Here's a quick hint to get you up and running and experimenting with Google Wave until your friends catch up: searching for public waves.
By adding the with:public qualifier to your search terms you can find public Waves to see how other people are using Wave and to start working with Waves yourself.