Wave, developed and supported by Google, was ........ well, i'm not quite sure exactly what it was. It kind of was a, well, ....... erm....... a social thing. To be honest i am not quite sure what it was, as it seemed to try to be a lot of things at once without actually being really good at a core function. Friends did use it to collaborate with each other, but we are talking hardcore geeks and nerds.
Google described Wave as
Wave is equal parts conversation and document. People can communicate and work together with richly formatted text, photos, videos, maps, and more. A wave is shared. Any participant can reply anywhere in the message, edit the content and add participants at any point in the process. Then playback lets anyone rewind the wave to see who said what and when. A wave is live. With live transmission as you type, participants on a wave can have faster conversations, see edits and interact with extensions in real-time.
I got an invite to Wave and logged on late last year.
I was totally flabbergasted by it. It meant nothing to me.
I am only one part geek/nerd, so the most of Wave was wasted on me as i struggled to come to terms with it. It lacked an intuitive interface.
And so i gave up quite quickly on Wave. And now it looks like so is Google.
Better luck next time guys.