> Wouldn't 20h/wk jobs be limited to inherently part-time, low importance tasks--which means you got to have plenty of funds to staff for them in the 1st place?

Interesting question. Not necessarily; as a lead developer, I just had an experience of a talented freelancer joining my project for 20 hours per week and helping with issues that we delegated to him so we can fit in the deadline. On one hand, _usually_, 9 women don't make 1 baby in 1 month; on the other hand, in this particular case the freelancer new the technology really well, and we delegated him with special issues that required less knowledge of our whole project and more knowledge of the tech itself.

So — yes, 20h/week limitation creates some problems, when you're working in the 40h/week team, but it's not the end of the world.