Forget star signs, what key do you press to wake up your computer from sleep?

To wake the computer up from sleep.

I use mine for Star Power in Clone Hero (Guitar Hero-ish game)

Way back in the day I always wanted one to use as my push to talk key for Ventrilo... But these days with noise reduction algorithms, boom mics with cardioid sensitivity spaces, and adjustable activation threshold, I just leave my mic on auto activate.

I should probably find something else to use it for...