26. A computer implemented method for conducting an informational search, the method comprising: receiving seed information, the structured web community neighborhood comprising a set of nodes that are more linked amongst themselves than to nodes in the network that are not included in the structured web community neighborhood; storing the seed information in a memory; generating seed nodes from the seed information, each of the seed nodes representing one or more web pages, and wherein the one or more web pages comprise one or more reference links; identifying a community of linked network nodes associated with a set of concepts using probabilistic percolation crawling from one of the seed nodes, wherein performing probabilistic percolation crawling comprises following the one or more reference links in and out of the one or more web pages to one or more neighboring nodes probablistically, wherein performing percolation crawling further comprises randomly selecting reference links in and out of the web page and in and out of the one or more neighboring nodes, wherein selected reference out-links are added to the community when the link satisfies a first probability and selected reference in-links are added to the community when the link satisfies a second probability and wherein each node is related to the community by at least one of the set of concepts; and annotating each of the plurality of communities of network nodes in the structural web community with a concept.
27. The method of claim 26 wherein the seed information comprises a key word.