I just received this missive from Google about their defunct Google Wave product:
Dear Wavers,
More than a year ago, we announced that Google Wave would no longer be developed as a separate product. At the time, we committed to maintaining the site at least through to the end of 2010. Today, we are sharing the specific dates for ending this maintenance period and shutting down Wave. As of January 31, 2012, all waves will be read-only, and the Wave service will be turned off on April 30, 2012. You will be able to continue exporting individual waves using the existing PDF export feature until the Google Wave service is turned off. We encourage you to export any important data before April 30, 2012.
If you would like to continue using Wave, there are a number of open source projects, including Apache Wave. There is also an open source project called Walkaround that includes an experimental feature that lets you import all your Waves from Google. This feature will also work until the Wave service is turned off on April 30, 2012.
For more details, please see our help center.
Yours sincerely,
The Wave Team
Related articles
- Wave Goodbye (carolinebeavon.com)
- Google Wave To End in 2012 (thegift73.wordpress.com)
- The last Wave (abhishekkathuria.wordpress.com)
- Google Wave Gets a Final Wave Goodbye (techie-buzz.com)
- Google sets Wave shutdown date, points to open source projects (h-online.com)
- Crashing Google Wave Finds New Life in Open Source (webmonkey.com)
- Wave Google Wave Good Bye [Greg Laden's Blog] (scienceblogs.com)
- Google Retires Knol, Wave, Friend Connect, Gears (ghacks.net)
- After Buzz, Google to discontinue seven more products (thehindu.com)
- Google Sets Kill Dates for 7 Services, Including Wave (techland.time.com)

Pity I liked Google Wave, and like many of the programs in their labs. They have been mothballed but hopefully will be resurrected inother format.
Wave idea lives on. At least in our project. We are making collaboration tools rizzoma.com And leaving necessaries functions. It wil be opensource.
Also we really need feadback. Alpha version already work on odessa.projectvolna.com and beta will be ready at Jun.
We need feedback and helping with english speaking guys:)
By the way export isn’t a problem.