Four leading trade magazine publishers have banded to form yet another ad network.

"BBN network" is comprised of Cygnus Business Media, Nielsen Business Media, McGraw-Hill and Reed Elsevier. Combined, the publishers reach 10 million users a month, including six million small business owners.

BBN shall operate independently from its parent firms, using tools from 24/7 Real Media to manage inventory and campaigns. It is expected the network's hefty userbase will attract finance and tech advertisers that do not typically buy space on B2B publication sites.