BlogTalkRadio, a site in which users can start podcasts of "radio talkshows" online from their phones, is expanding to the enterprise.

It is currently in the process of developing content partnerships with a number of pubs and media organizations, including PBS, Women's Day Magazine and others.

The aforementioned titles will use BlogTalkRadio to launch their own podcasts and syndicate existing web content; for example, PBS' Worldfocus TV newscast is syndicated through the platform, TechCrunch observes.

The company will also create branded private networks for a handful of major brands, including Harper Collins, Wal-Mart, Sun Microsystems and the US Pentagon. The networks will empower companies to create, syndicate and publish their own podcasts and talkshows.

The company profits from charging companies licensing and sponsorship fees for branded channels. Paying clients also have the freedom to place their own ads in their shows — including banner, pre-roll audio/video or spoken ads. Live events, streamed to their talk show, are also fee-based.

BlogTalkRadio currently supports about 1000 live broadcasts per day.

A Podtrac/TNS survey from last year found ads in podcasts are three times as effective as "traditional" online video ads — and seven times more so than television ads. As of September 2008, however, only 19% of internet users say they have downloaded a podcast. But the figure remains encouraging, given that it's up from 12% in 2006, according to Pew.