When the Human Genome Project finished sequencing the first human genome earlier this decade, the price tag for the endeavor had reached almost $3 billion. Now, IBM has announced details of its effort to bring the cost of sequencing a person's genome down to below $1,000--and the company says it could go as low as $100. While IBM is hardly the only company racing towards these goals, the company's chip-based approach makes it a serious contender. The company's technique involves