Recently there was a Google Wave based conference called
RITMO 2010. You can imagine it like a virtual conference, where people are not gathered in crowded rooms, but sit in their comfortable chair in their home or workplace and discuss the conference topics through Google Wave.
This conference had a panel about Wave-Email integration. Mr. Ray and Emaily was invited. Here is the wave, you have to scroll down to 75% if you are interested in the past, present and future of Emaily: