1. A method comprising: using one or more computers, obtaining, from a first user, a query for information including review, comment, or purchase information from users in a social network of the first user, relating to a first product or service, product or service type, or brand; using one or more computers, based at least in part on the query, obtaining a first set of information including review, comment, or purchase information from users in a social network of the first user, relating to the first product or service, product or service type, or brand; using one or more computers, utilizing the first set of information, formulating a reply to the query, wherein the reply includes information of the first set of information, and comprising aggregating information of the first set of information; using one or more computers, facilitating providing, or making available, the reply to the first user; and allowing users to save and modify queries, wherein obtaining the query comprises obtaining parameters including a time frame of considered or intended purchase by the first user.