Video blog Rocketboom, having decided to run ads on its site for the first time since its launch in 2004, is auctioning its video inventory on eBay, writes MediaPost (via MediaBuyerPlanner). The auction is for five post-roll video ads to run in each daily video log entry from March 6 to 10. The ads, which will run 15-30 seconds, will be created and produced by Rocketboom rather than the marketer, though the marketer will give input and have final approval. Rocketboom has reserved the right to reject any bidder, and it won't accept ads for pornography or gambling.

According to the description on eBay, "Rocketboom reaches a minimum of 130,000 people per day and each day's video, over the course of several days, receives over 200,000 complete views. Thus, the advertisement reach for this auction is currently a minimum of one million views."

eBay made a pitch at the Association of National Advertisers' Television Advertising Committee about creating a trading system online for television ad inventory.

At least one online auction marketplace for ad inventory exists already: Bid4Spots, launched in September, has sellers of radio remnant space offering bids, with the lowest price winning.