What are some well-known, online news sources that are worthy of language study?
Based on your demand, here are my picks. They're locally famous.
China mainland

南方人物周刊, a featured weekly on influencing people, with some exclusive interviews.

南方周末, a weekly on politics, economics, culture, and especially recent (past week) controversial topics.

新京报, a daily with Beijing (or China) features. Founded in 2003.

财经网, a good source for financial and business news.

腾讯网, a major Internet portal.

三联生活周刊, a major life style magazine.

FT中文网, Chinese version of Financial Times, also with many Chinese columnists.

China Daily 中文版, famous for its English version, a major English daily.

财新网, another good source for financial and business news.

优酷网, the biggest video portal, YouTube's copycat, even from its name.

重庆晨报, for those who wanna have PDF version of newspaper, this one's for you.

第一财经周刊, a reader-friendly financial weekly.

外滩画报, full of featured stories with pictures.


Hong Kong

亞洲周刊, a weekly on politics, economics and culture.

明報, founded by Louis Cha Leung-yung, a renowned novel writer, and his co-founder in 1959.

文匯報, a left (pro-) newspaper. Founded in 1948.

大公報, another left newspaper. Founded in 1902.

星島日報, yet another left newspaper. Founded 1938.

鳳凰網, semi-official CCTV like channel in Hong Kong.

TVB無線新聞, famous TV channel.

壹週刊, a sibling of Taiwanese 蘋果日報, quite popular and entertaining.


Taiwan

中央社, a major news agency in Taiwan. Quite official. Founded in 1924.

蘋果日報, a major daily. Good at entertaining people. I like its 3D video news.

自由時報, as its name suggests, it's somewhat Pan-Green. Founded in 1980.

聯合報, a conservative major daily founded in 1951.

中國時報, a major daily. Founded in 1950.

中央日報, used to be official newspaper of the Kuomintang, founded in 1928.

天下, a financial-oriented magazine founded in 1981.

商業周刊中文版, Taiwanese version of Businessweek, with some local stories too.