Here at the Allen & Co. Conference in Sun Valley I sat down with WPP CEO Sir Martin Sorrell for a live on-camera interview, and we continued our conversation off camera. There's no question the ad market is suffering, this year down just over six percent globally, according to his numbers, and even more in the US. And based on Sorrell's month-to-month analysis there's no sign of a bottom just yet, though it looks like the market could turn around in the beginning of 2010.

With several of the giants here sitting on billions of dollars in cash, everyone's speculating whether Twitter could be an acquisition target. CEO Evan Williams recently told me that he's not interested in selling the company at this early point in its life cycle. Still, that's not stopping the, well, twitter about the company.

I just landed in Sun Valley for the annual Allen & Co. conference in Sun Valley. There are only a handful of private jets in the airport right now, but in just a few hours it'll be packed with jets whose tail numbers tell the story of some of the richest men in America.

Michael Jackson's memorial at the Los Angeles Staples Center will be a traffic-stopping mob scene; an expensive, coffers-draining circus for the city. But it'll also be a huge cash cow for a number of Los Angeles businesses.

It's been a tumultuous summer for DVR service TiVo, with a handful of court rulings that have sent the stock bouncing all over the place. The latest news is sending the stock down.

It's not surprising that there's yet another lawsuit claiming copyright infringement in the music industry. But it is surprising that this latest suit doesn't attack typical pirates, but companies that actually run paid online music subscription services.