Not sure why the whining. Wave is not for everyone the same way twitter is not for everyone and IM is not for everyone.
I haven't got any invite yet on Wave, but I can see a lot of potential of this platform and I can already see myself using it extensively when it hits "mainstream".
I don't think wave is just "another thing" that will distract you from your work. I think wave already has the potential to get rid of 3-4 external services I depend on and it just started.
Most important. Its free and open source.