Search engine marketers might be interested to learn about a new service from eBay that launched yesterday. It allows subscribers (three different payment plans are available) to access a ton of business intelligence from the eBay database including top keyword searches by category or related keywords.
The most costly plan ($24.99/month) offers some additional features including the ability to see searches by site or country and includes 90 days of historical data. More about what search metrics are available in this FAQ. Additional info about the service in general is available from Beta News and the IDG News Service.