My disabled daughter's trust manages all her day-to-day admin work via Wave, keeping trustees, family and friends in touch. The trust's regular meetings are minuted and available to everyone who has an interest in my daughter's care and wellbeing.
Sure, Wave is a bit clunky and it could do with a little streamlining here and there, but it's useful and free. Where Google is happy creating its own "Evil Empire" in some areas, it has been positively cuddly and kindly in others, and Wave will be missed greatly in this household. Not perfect, it's true, but a handy tool that has kept those involved apprised of my daughter's health and care requirements and has, to my knowledge, kept prying eyes away from confidential information.
We could use Facebook or one of several other methods of staying in touch, of course, but Wave's very obscurity has, for us at least, been one of its chief strengths.
Sad to see it go, frankly, but pleased that Google gave it a go.