Primedia is in talks with investment bankers at Credit Suisse First Boston to sell its Primedia Business Information unit. The unit, which consists of 70 B2B publications, 100+ Web sites and 25 special events, was responsible for about 15-20% of the company's overall revenue last year ($224.8 million of a total $1.3 billion). The move comes amid efforts by the company to slim down and re-focus its energies: in February, for example, Primedia sold off its About.com unit to the New York Times for $410 million.