Whatever you say about Apple and its products, Steve Jobs was a leader and an innovator. It's best not to listen to those who say he was THE leader and THE innovator, as their attitudes and Apple's itself are rather unhealthy, but the man himself was overall good.
I don't know what Apple is going to do with him gone... he really was the heart of the company, and it was always in better business when he was around. I guess we'll just wait and see.
I may be a devout Microsofter, but I still have to give him due respect.