From ZDnet:
…eBay unveiled this weekend a new, automated keyword-based contextual ad system for use by its partner network…..The new automated eBay AdContext product differs from eBay’s current manual ad placement system for promotional partners. Currently, partners create their own selection of eBay ads on their Web pages, by manually entering specific keywords and categories as search terms in order to return listings. eBay AdContext, however, will automatically read the content of the Web site—which may change daily—and surfaces ads that are most relevant to that content.
For now, this is only on eBay….but…More on this soon.