Madison Logic, a technology firm that claims to help business-to-business marketers target likely customers online, has acquired a Maryland ad platform called BBN Networks. With BBN under its umbrella, Madison Logic now owns a system of distributing ads across sites that reach 125 million business decision makers monthly. "By bringing the two companies together, we can more fully meet the needs of B2B marketers and publishers who have expressed an urgent need for a media, marketing and enterprise…