Abstract: A system and method may add to a web page a similar-content module which may contain information related to the context of the web page, may look like a portion of the web page, and may lead to a jump page which presents information in the similar-content module in more detail and contains an advertiser's advertisement or a link to an advertiser's web page. If a user is interested in the information in the similar-content module, he may click on the module and be sent to the jump page. Displaying the similar-content module will not cost any advertiser anything. A pay per impression advertiser will not be charged until its advertisement is displayed on the jump page, and a pay per click advertiser will not be charged until its link in the jump page is clicked on.

Abstract: A system and method may add to a web page a similar-content module which may contain information related to the context of the web page, may look like a portion of the web page, and may lead to a jump page which presents information in the similar-content module in more detail and contains an advertiser's advertisement or a link to an advertiser's web page. If a user is interested in the information in the similar-content module, he may click on the module and be sent to the jump page. Displaying the similar-content module will not cost any advertiser anything. A pay per impression advertiser will not be charged until its advertisement is displayed on the jump page, and a pay per click advertiser will not be charged until its link in the jump page is clicked on.

Abstract: A method and system are provided for defining a search space of a community in which a client may search for resources. A client providing a resource registers the resource with a core. The core then lists the resource with an advertising service, which serves multiple cores. A client searching for a resource can search in the client's core and within the advertising service serving the clients core. In addition, a client searching for resources can define a community of advertising services remote to the client's core, then designate the community when sending an attribute-based search for computer resources to the client's core. In some embodiments, once a community is defined, a client can subscribe to an events within the community by searching for an event distributor within the community. The client is then notified of events occurring within the community that match the client's event subscription.