I loved Wave. My biggest problem was that no one else knew about it, so I was waving into a vacuum!
It was a very intelligent and intuitive combination of email, blog, forum and IM with multimedia and apps. It was fantastic, and could have been the answer to a lot of communications problems which even a solution as powerful and expensive as Office fail to address.
Unfortunately, most people just didn't "get it"

I predict something remarkably similar will rule the roost in 10 years time. The world just wasn't quite ready for information convergence, but the next generation will demand it.
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