Google is thankful that so many people have been willing to try out Google Wave in a host of different areas: personal, business, government, education and even not-for-profit. We’ve been glad to see positive responses, especially since we’re still in a limited preview and not quite ready to give accounts to everyone who has requested one.
Since we can’t talk to all of our users individually (no matter how hard we try!), we’ve been running an online survey
The wave itself: The concept of a wave as a central place to communicate and collaborate is what people say they like the most.
One place to discuss and work together: The next most popular is the ability to use Google Wave to work together and integrate messages and documents; many respondents have indicated that existing methods and tools don’t meet all of their needs.
Extensions: Close behind the collaboration features, survey respondents liked the ability to extend Google Wave’s functionality through gadgets and robots.
Source: Googlewave.blogspot.com