Google Wave now lets anyone with a Google account to jump in and see what the early adopters have been squawking (and snarking) about. Head to wave.google.com now to get Waving, but read on for some beginner tips and use cases.
Gina and Adam have been using, testing, and detailing Wave's features from day one, and their Complete Guide to Google Wave is available as a free read on the web (with paid PDFs and print copies also offered). Gina's also offered frequently asked questions about Google Wave, charted the differences between Wave and other messaging/editing apps, feature by feature, and offered real-world use case studies, many of them provided by readers and Twitter followers.
As noted, Google/Gmail users can head to wave.google.com and start tinkering right away. If you're a Google Apps user, your administrator can also enable Google Wave for group use right now—the details are explained at the Google Enterprise blog. Tell us what you think of Wave as a new user, or a veteran watching the progress, in the comments.
Google Wave Available for Everyone [Google Wave Blog]