MSNBC.com has launched online vertical advertising networks for the TODAYshow.com and political sections, which allows small publishers access to its content while increasing ad inventories.

Large online publishers are currently competing for a greater share of inventory with the major ad networks such as Google AdSense, Gorilla Nation or Glam.com, which are the largest single holders of ad inventory in any vertical market segment.

With this new approach powered by Publisher's Vertical Network, MSNBC.com is trying to monetize vertical markets.

"We'll be rolling out more this year," Mark Josephson, president of Seevast, parent company of provider Pulse 360, which offers the PVN platform, said. "Big publishers are understanding the opportunity. We have a very robust pipeline. This is a real trend."

Kyoo Kim, vice president of advertising for MSNBC.com, said the networks "provide us with an innovative way to capitalize on our leadership position and focus our ad sales efforts. The result is substantive value to members and increased inventory for MSNBC.com."

Member Web sites that join in these two new MSNBC.com networks will gain more ad revenue via display advertising and sponsor links, have access to MSNBC.com video feeds and story headline for their own sites and boost the visibility of their search engines.