Seems Google could hit a significant snag in their plan to sell radio commercial air time: Inventory. The company, according to reports, simply doesn't have enough time for the program to have any real revenue impact or to allow for a thorough trial by advertisers. That's at least part of the reason it is reported to be pursuing a business relationship with CBS that would give it access to the network's radio inventory. That would allow Google to pretty much set its own terms. Without the CBS deal, or another similar one with a large networker, coming to fruition Google is not expected to see any real profits from their Audio Ads program until the middle of 2007. Google sales reps have apparently begun selling advertisers on the idea of integrated radio/online campaigns.