No, I think he's got it right. A blip is just a distinct (per-user) document that lives in a wavelet (the wavelet can have a distinct membership from any other

No, I think he's got it right. A blip is just a distinct (per-user) document that lives in a wavelet (the wavelet can have a distinct membership from any other wavelet in the wave). So the wavelet functions as an "email" (which can have sub-emails with different contributors) in the wave "email thread".