Rack one up for the young Chinese startups that may someday be the Googles of tomorrow. A Nasdaq-style stock exchange began trading in China on Oct. 30. Dubbed ChiNext, it debuted with 28 listings. It offers (mostly Chinese) investors the first real crack at a host of lesser-known home-grown players in the software, drug, energy and other sectors. ChiNext, also known as the Growth Enterprise Market or GEM, is a secondary board of the Shenzhen