I think Google Wave/Apache Wave is a good candidate here, at least for the crowd familiar with it.Designed to be a new modality of digital communication, it combined features of email, messengers/chat, collaborative document editing, etc.It got a ton of excitement from a niche crowd while it was in a closed beta.It never got off the ground, though, and less than a year after finishing the beta, it was slowly turned down and eventually handed over to Apache.
I think Google Wave/Apache Wave is a good candidate here, at least for the crowd familiar with it.
Designed to be a new modality of digital communication, it combined features of email, messengers/chat, collaborative document editing, etc.
It got a ton of excitement from a niche crowd while it was in a closed beta.
It never got off the ground, though, and less than a year after finishing the beta, it was slowly turned down and eventually handed over to Apache.