Jeff Livingston never drags a laptop computer along when he travels out of town for work, but he knows that other businesspeople do - and that many don't like the extra burden.
He says that hunch could mean $300 million in new business for his Hunt Valley company, DPI Business Information Systems Inc., if it plays its cards right. DPI is joining NCHnet LLC, based in Washington, to wire hotels with in-room computers and high-speed Internet access.
DPI, a $7.1 million-a-year systems integrator and networking services company, has designed a product that networks an entire hotel, and NCHnet hopes to begin marketing the technology by mid-1999,
"We're going beyond helping people who bring a laptop and need Internet access," said Livingston, chief …