Announced at the Google I/O keynote, Google Wave is now open for business. The formerly invitation-only communication and collaboration tool has improved quite a bit since our first take on it. Over the last six months, it has become much more stable and also rolled out an extensions gallery.
Waves can be lonely places and having more users will definitely help. With this in mind, I recommend taking a look is the UKOLN blog‘s helpful summary of what the librarians have been getting up to on Google Wave. There are also plenty of case studies to demonstrate the different ways people are already using waves.
The Complete Guide to Google Wave (a book written by by Gina Trapani and Adam Pash using Google Wave) is free to read online and goes into quite a lot of depth about the functionality available now as well as what’s planned for the future.