Loved this posting by Ben Romstech on his company blog:
Google Wave, First Impressions
I laughed out loud at this bit:
"Using it suddenly makes Chrome and Chrome OS make a whole lot of sense. If you listen carefully you can hear Ballmer's chairs flying around in the background..."
Ben Par at Mashable has posted his short review as he and his colleages have been testing since the devloper release in May: Google Wave, Is the world ready ?