Saw a reference to this post in the Google blog announcement. Been thinking about similar things. Not surprised that Bruce D'Arcus would end up here... ;-) The OA angle is an important one. Not only because ease of putting things in a repository is important in getting people to do the right thing, but because it shows what "publishing" really means. In this case, as in several others, GWave puts some core issues at the forefront. Can't wait to start using Wave.