Mozilla announce the Google Wave killer : Raindrop

Whereas the Google Wave “BOOM” is not yet finished, Mozilla unleashes Raindrop : “an exploration in messaging innovation being led by the team responsible for Thunderbird, to explore new ways to use Open Web technologies to create useful, compelling messaging experiences”.
“Raindrop also wants to pull in messages from Twitter (Twitter), Facebook (Facebook), IM, and eventually any other communication platform with an API. Direct messages and @replies would be seen as more important and therefore foregrounded over regular not specifically to you messages. The idea is to make a people-centric communication tool that brings your various services together in one interface, instead of constantly playing a game of “find that browser tab” when you want to check up on a particular conversation or thread.” (Barb Dybwad from Mashable)
See a video below
Raindrop UX Design and Demo from Mozilla Messaging on Vimeo.