Profiles nine cyber entrepreneurs, revealing their exhilarating highs and painful mistakes. Offers an insider's perspective on spotting untapped niches, writing a business plan, cultivating strategic partnerships with quality vendors, and recruiting talented people, and gives insight on targeting and retaining customers and forecasting future Internet trends. Aspatore is founder of a firm which helps companies launch new business ventures. He writes a monthly column for . Annotation c. Book News, Inc., Portland, OR (booknews.com)