Replacing shortcuts that use the eject key on MacBook Air lacking such a physical key? I'm getting used to working on a MacBook Air this week and find myself wondering if I can systematically change the default system shortcuts to use the power button as a direct substitution for the shortcuts that employed the eject key on previous keyboards.

I figure there is a really good reason why Apple didn't just enable this by default, but it would be nice to use the one such combination that I am most familiar with:

control + shift + eject which shuts off the main display immediately

An answer that addresses this one issue narrowly would be great if there is a longer wait for a more general, comprehensive answer.
The most comprehensive package for remapping the keyboard is KeyRemap4MacBook.

It's a bit complex, but will allow you to do almost anything.