Well, I had Aerobiz Supersonic, not plain Aerobiz. I beat it a couple of times. It's very cool. When I needed to win a region over another company really badly, I'd slash my rates to 50% off. Starting out in Southeast Asia is a good strategy. You have lots of choices for routes. Have you seen the fictional Boeing BJ2000? (I think that's what it's called) It could hold 1000 people!
Anyways, it's an awesome game.