Researchers and IT managers are confirming security vendors' claims that spam levels have spiked in the past month -- some say by as much as 80 percent -- and show no signs of decreasing. "There are enormous amounts of spam; it's shot up like crazy since the beginning of October," says John Levine, president of consulting firm Taughannock Networks and co-chair of the Internet Research Task Force's Anti-Spam Research Group, which operates a number of e-mail addresses that aren't filtered for spam.