I'm a fan of Cheng Ch'ing-wen (鄭清文), though some of his stuff can be a bit hard to read (be that a sin of translation or just how he writes I cannot say). A fairly well known collection of his short stories, Three-Legged Horse, can be found on Amazon. I'm a huge fan of the story called Betel Nut Town in the English translation. Though it's about a rich Taipei girl's trip to the South, it reminds me of my own experiences, and I suspect that it would speak to many a foreigner in Taiwan (it's also just a really beautiful story).