Ask HN: Who has been using google wave and for what reasons?

I've been using Wave for startup product collaboration (a development project with 2 people on one location and the 3rd person on another location). The way Wave has been used is roughly like a digital shared whiteboard for product ideas and requirements.

The reasons why I use Wave is because it works relatively good (except that it gets somewhat less responsive on very long threads) and that it needs zero maintenance from our side.