26. An information processing apparatus performing voice chat with other information processing apparatus, the apparatus comprising: a parameter extraction unit that extracts a parameter from voice data generated from a dialog of the conversation during the voice chat, the parameter characterizing the voice data; a keyword extraction unit that recognizes the generated voice data and extracts keywords from the voice data based on the parameter and a keyword extraction database; an information search unit that searches for the extracted keywords using a search engine and acquires a search result for the keywords and articles related to the keywords, the information search unit acquiring from the search engine a search keyword list containing search keywords searched by the search engine and rank information associated with the search keyword list; and a search information accumulation unit that accumulates the keywords and the articles in a correlated manner with address information of the search result for the keywords and address information of the articles, respectively, wherein the search engine represents a website that provides a keyword search service and a directory search service so that a user uses the search engine to search for information available through Internet.
26. An information processing apparatus performing voice chat with other information processing apparatus, the apparatus comprising: a parameter extraction unit that extracts a parameter from voice data generated from a dialog of the conversation during the voice chat, the parameter characterizing the voice data; a keyword extraction unit that recognizes the generated voice data and extracts keywords from the voice data based on the parameter and a keyword extraction database; an information search unit that searches for the extracted keywords using a search engine and acquires a search result for the keywords and articles related to the keywords, the information search unit acquiring from the search engine a search keyword list containing search keywords searched by the search engine and rank information associated with the search keyword list; and a search information accumulation unit that accumulates the keywords and the articles in a correlated manner with address information of the search result for the keywords and address information of the articles, respectively, wherein the search engine represents a website that provides a keyword search service and a directory search service so that a user uses the search engine to search for information available through Internet. 30. The information processing apparatus according to claim 26 , further comprising a display unit that displays a keyword that is correlated with address information of the search result for the keyword and an article that is correlated with address information of the articles related to the keywords.