Currently Being ModeratedAug 24, 2012 6:21 AM (in response to lifenoise)
You can install OS X in all your computers without paying again. Open App Store > Purchases and download Mountain Lion
Currently Being ModeratedAug 24, 2012 6:24 AM (in response to lifenoise)
No, as long as you log in to the Mac App Store on your Mini with the same ID as you did on your MacBook Pro. Once logged into the MAS on your MBP, click the Purchases tab at the top and you should see the Mountain Lion product with a Download button nearby.