I have now received an invitation to sign up for Google Wave to have access to the sandbox account.

As mentioned earlier, the initial concepts behind Google Wave appear to be too powerful to be ignored. As it could be a revolutionary technology that bridges the gaps between email, chat, forum, blog, etc, it might change into a resource that all of us will pay attention to.

If you are interested, you can also request for a sandbox account by signing up here: https://services.google.com/fb/forms/wavesignup/

Will provide more updates soon after I start playing around with the sandbox environment.