I want to correct one thing here. Singapore uses simplified just as the Mainland China.
And it is always good to refer to wiki for details.
http://en.wikipedia.org/wiki/Chinese_character
Even some people from the mainland like me prefer traditional over simplified, there's no doubt simplified will give you a better return in domain investment given the economic promise of PRC compared to Taiwan or Singapore. As already part of PRC, Hong Kong and Macau, even though still stick to Traditional Chinese, accept Simplified if they want to deal business with their countrymen outside HK and MA themselves, which is true in most cases.