Mary Schapiro, America’s new top cop for the securities industry, said the current mass culling of journalists’ jobs is a concern because it could reduce the number of leads that regulators get as they seek to crack down on nefarious behavior.

“It’s an absolute worry for me because I think financial journalists have in many cases been the sources of some really important enforcement cases and really important discovery of practices and products that regulators should be profoundly concerned about,” the chairman of the Securities and Exchange Commission told the Reuters Global Financial Regulation Summit in Washington on Tuesday.

“But for journalists having been dogged and determined and really pursuing some of these things, they might not be known to the regulators or they might not be known for a long time,” she said.

But Schapiro, who was speaking a day after Conde Nast announced the closure of its glossy business magazine Portfolio only about two years after it launched, held out some hope for the business reporting trade. She said that some journalists should consider applying for jobs at the SEC.

“Investigative journalism actually would be a pretty interesting skill set for us to have. We’ve talked about financial analysis, we’ve talked about forensic accounting being skill sets that we really need — understanding of complex trading, strategies and systems, but it’s one of the things the SEC has to do. It has to really broaden its horizons and bring in people who think about things a little differently than it has historically.”

But what would having Mr/Ms Investigative Journalist working there do for the SEC’s tarnished media image? And how would a hard-nosed investigative journalist respond to all those agreements to let some of the bad guys off with a rap over the knuckles and a small fine (those infamous “did not admit or deny” settlements)?

MySpace co-founder Chris DeWolfe is bullish on the mobile advertising market, but says ad agencies and corporate sponsors haven't figured out to dial into it.

Speaking at the Reuters Media Summit, DeWolfe outlined MySpace's mobile efforts, such as its Blackberry application. He said the company was targeting more download applications for mobile devices. He said he saw big opportunities in the mobile-based advertising sector once there's some standardization.

We think the future of mobile is more advertising based. But the marketplace on the advertiser side has not quite caught up to the inventory out there... It's relatively undeveloped, but we think it's a market that will grow.

He said countries like Japan were ahead of the curve in mobile advertising, but that it will take the U.S. a couple of years to catch up.

We're generating revenues right now on the mobile side from advertising and will generate more next year. ... It's a function of whether the agencies and brands coming up with standardized ad units and are making investments to do that.

So far there's been enough inventory on the MySpace side, but not enough advertisers with creatives that have wanted to jump in or a critical mass of Web sites that they've wanted to reach. But we'll see more demand and its a function of educating the marketplace.