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 the end of 2010. Today we’re 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. So we'd encourage you to export any important data before April 30, 2012.