Previously mentioned EtherPad, a real-time collaborative service for text and documents, has been acquired by Google to enhance their real-time collaboration tool in Google Wave.
Google has actually acquired AppJet Inc., the creators of EtherPad and inducted them into the Google Wave team, according to a blog post from them.
Google Wave has been widely published but has still to get off the mark as many users are still clueless about how to use this service. One of the most important features in Google Wave is real-time collaboration, and this acquisition definitely fits their needs.
However, it would be good to see how Google uses the technology from AppJet as they already have something similar in the form of Google Docs.
If you are a Google Wave users, you might want to check out a comprehensive guide for newbie’s and advanced users alike, in the Ultimate List of Tips and Tricks for Google Wave.