AshtonKutcherSteveJobs230.2.jpgAshton Kutcher, usually a frequent Tweeter, has been largely staying mum since rumors started spreading last week that he had cheated on wife Demi Moore during their sixth anniversary weekend.

But, the passing of Apple co-founder Steve Jobs on Wednesday has moved Ashton to end his virtual moratorium.

Kutcher, a big advocate of advancing technology and social media, was clearly broken up over Jobs' death. He Tweeted:

  • "Be a yardstick of quality. Some people aren't used to an environment where excellence is expected." - #SteveJobs

  • "Your time is limited, so don’t waste it living someone else’s life." -- Steve Jobs

  • I never thought I could be so busted up about the loss of someone I never met. #stevejobs

  • We have all surfed on the wake of Steve Jobs ship. Now we must learn to sail, but we will never forget our skipper.

  • Sending love & light to everyone @Apple & the entire Jobs family.Today we lost a Giant who will be missed even by those who didn't know him.

  • Design is not just what it looks like and feels like. Design is how it works. - Steve Jobs RIP

Demi Moore, who has also remained relatively (and unusually) quiet on Twitter, has not commented on Jobs' passing.