Notebook... MAY JLC 1997 by James Leatherwood and Ted Cushman If you believe all the hype, Internet marketing is the wave of the future. But does it work for contractors in the here and now? As far as we can tell, results are mixed. A "presence" on the Internet — whether accomplished by creating a home page on the World Wide Web or by participating in e-mail forums or discussions in Usenet newsgroups — will put you in touch with a lot of people. But since contracting is a local business, the nationwide contacts you can make via the Internet don't often result in sales. Ken Twining, an electrical contractor in Maryland, says his home page on the World Wide Web