The eBay-powered marketplace to sell television ads is coming along smoothly. According to a MediaPost article, the beta version of the interface is ready. The steering committee -- loaded with marketers from top advertisers like Intel (NASDAQ:INTC), Home Depot (NYSE:HD), and Hewlett-Packard (NYSE:HPQ) -- is psyched. Even Wal-Mart (NYSE:WMT), the world's largest retailer, is gearing up to participate in eBay's (NASDAQ:EBAY) marketplace.

The service is still on target to launch next month, but what happens if you throw a television party and nobody shows up? For now, the one missing ingredient in this ad-selling system is the lack of suppliers to satisfy the hungry advertiser demand.

The steering committee is hoping that a presentation at AAAA's Media Conference in Las Vegas next week will help fill that void. The Media Marketplace is initially geared towards cable operators with extra inventory to unload. Larger broadcasters aren't as smitten with the process of farming out the ad-selling process.

Still, it's just one more step in media domination by Internet bellwethers. Look at Google (NASDAQ:GOOG) moving to sell radio ads and Yahoo! (NASDAQ:YHOO) powering online employment classifieds for newspaper publishers -- you can teach the old economy some new economy tricks.

All eBay is waiting for now is for cable operators to click the "Buy it Now" button to buy into the promising marketplace.

Yahoo! and eBay are active recommendations for Stock Advisor subscribers. Home Depot, Intel, and Wal-Mart are Inside Value newsletter service selections

Longtime Fool contributor Rick Munarriz would put up his television viewing time up for bid if he could. He does not own shares in any of the companies in this story. He is also part of the Rule Breakers newsletter research team, seeking out tomorrow's ultimate growth stocks a day early. The Fool has a disclosure policy.