eBay has launched a wiki (define) to allow any of it’s members to share and edit information about doing business on the site with each other.
The most famous wiki is Wikipedia which maintains incredible consumer generated information about almost anything. Ebay has partnered with Jotspot to produce it’s wiki.
Perspective: eBay has always let it’s members provide support and advice to other members, that’s part of it’s business model. The strong community and it’s rating system work together to ensure content is self moderated. Unlike carefully crafted marketing material, the information is trusted because it’s provided by real people voluntarily.