Learn more about it at CBS.MarketWatch.com's First Spam, now Spit

Here's a bit from the article:

If you can send a thousand e-mails with a click of the mouse, you can do the same with a phone call, if you're using the Internet as your telephone service.

A privately held technology company, based in Frederick, Md. is trying to attack the problem of what it calls Spam over Internet Telephony, or Spit.

"It's a combination of telemarketing calls and e-mail spam in which a single 'caller' uses Internet technology to send thousands of voice messages simultaneously into VoIP mailboxes."