According to this report, hanyu pinyin is to be officially adopted in Taiwan from the beginning of next year.
The main romanization systems currently used in Taiwan are Wades-Giles and Tongyong Pinyin. However, as they are not taught in schools, mistakes and misspelling are very common, and it’s not usual to see the romanized name of a street written in several different ways. The Wade-Giles system was devised by Thomas Francis Wade, a British ambassador to China and Chinese scholar, in the late 19th century, and refined in 1912 by Herbert Allen Giles, a British diplomat in China. The Tongyong Pinyin system was invented in Taiwan and adopted in 2000. Hanyu pinyin was developed in China in the 1950s and was adopted as the international standard for romanizing Chinese in 1979.
It hanyu pinyin is adopted for place names as well as street names, Taipei will become Taibei, Kaohsiung will change to Gaoxiong, Hsinchu will change to Xinzhu and Keelung will change to Jilong, along with many other changes.
You can find details of places names in Taiwan at:
http://pinyin.info/taiwan/place_names.html
This is a positive development, however it remains to be seen whether local governments in Taiwan will be more consistent in their use hanyu pinyin than they have been with Tongyong pinyin.

