Mozilla's response to Google Wave: "Raindrop"

just found here:
http://www.theregister.co.uk/2009/10/23/mozilla_labs_raindrop/

Mozilla Messaging, this forked foundation in charge of Thunderbird now, is developing Raindrop:
http://labs.mozilla.com/raindrop

more here:
http://arstechnica.com/open-source/news/2009/10/first-look-inside-mozillas-raindrop-messaging-platform.ars