Wave I still miss. It was like it didn't go gangbusters straight away so google binned it off. Any it only didn't work because of the stupid JS hijacked chat scroller, where was its promise as a new chat protocol.

I've said before that there is probably an interesting alternate universe out there was G+ was built on top of Talk, Reader, and Wave instead of replacing those three. They really did throw out several babies in trying to throw out their over-silo-ed bathwater. One can only imagine the world in which the UX work applied to the G+ walled garden Facebook clone effort had instead been used to polish (a federation-capable) Wave and make it a consumer friendly product...