10. A computer-readable memory device that includes instructions to control a processor, the instructions comprising: a set of instructions to extract information from each of at least two different sources, the at least two different sources including; a post to a blog, and at least one of a feed associated with the blog, the blog, or a document to which the blog links, where the information extracted from the at least one of the feed, the blog, or the document to which the blog links includes information that is different from information that is part of any post to the blog; a set of instructions to create a hybrid document that includes information from the post and from at least one of the feed, the blog, or the document to which the blog links; a set of instructions to store the hybrid document in a searchable index; and a set of instructions to use the searchable index to determine a relevance of the post to a search query.
10. A computer-readable memory device that includes instructions to control a processor, the instructions comprising: a set of instructions to extract information from each of at least two different sources, the at least two different sources including; a post to a blog, and at least one of a feed associated with the blog, the blog, or a document to which the blog links, where the information extracted from the at least one of the feed, the blog, or the document to which the blog links includes information that is different from information that is part of any post to the blog; a set of instructions to create a hybrid document that includes information from the post and from at least one of the feed, the blog, or the document to which the blog links; a set of instructions to store the hybrid document in a searchable index; and a set of instructions to use the searchable index to determine a relevance of the post to a search query. 30. The computer-readable memory device of claim 10 , where the extracting information from the post to the blog includes: extracting at least one of content of the post, a title of the post, an author of the post, or one or more timestamps associated with the post.