Mike Foster's Palm Vx could cost him money today-lots of it. The professional speaker, whose specialty is telling businesses how to exploit new technology, has a chance to make $240,000. But he must respond promptly to an international organization that has requested a speaker for 24 of its chapters. At $10,000 a pop, it's an opportunity Foster can't pass up. But critical information he needs to close the deal is locked in an e-mail attachment that is slow to open. The e-mail itself is next to impossible to view on his PDA's low-resolution screen. Someone else might reach the meeting planner first and get the job-and the payday.

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