I've been thinking that they should initially roll WAVE out as plumbing. They could transplant GMail/Buzz/Google Talk/etc to run on Wave without forcing people

I've been thinking that they should initially roll WAVE out as plumbing. They could transplant GMail/Buzz/Google Talk/etc to run on Wave without forcing people to learn the interface up-front. Users would be building up content 'in' Wave and Google would be slowly integrating the features that Wave makes easy. Then the Wave interface (the biggest stumbling block for most) can be introduced as an optional power-user interface; but wholly compatible in case people want to bounce back and forth as they ease in and backward-compatible with people who aren't ready to take the plunge. (fully backward compatible, in the case of other GMail users) I just don't think Wave is there yet.