The second is to go searching round the web for sites and apps that work in a similar way to Google Wave. And that's exactly what I have done.
Although it has many unique features people are already using web based tools and sites to make and share documents. In a very basic way there is a great deal of collaboration already going on via Facebook, Twitter and even MySpace, while at the more corporate end of the spectrum are several excellent collaboration tools already such as the UK's very own Huddle. Then of course there are already millions of people across the globe using Microsoft's collaboration tools.