14. One or more devices comprising: a comments database that stores comments associated with documents; a searching component to receive a request for comments associated with a particular document and to identify the comments by searching the comments database, where the request for comments is associated with a particular user; a ranking component to rank the identified comments based on a combination of objective scores and subjective scores, comprising: an objective ranking component to generate the objective scores for comments, where the objective scores are independent of the particular user, and a subjective ranking component to generate the subjective scores for comments, where the subjective scores depend on the particular user; and an interface to provide, to a client device associated with the user, the ranked comments for presentation in connection with the particular document.
14. One or more devices comprising: a comments database that stores comments associated with documents; a searching component to receive a request for comments associated with a particular document and to identify the comments by searching the comments database, where the request for comments is associated with a particular user; a ranking component to rank the identified comments based on a combination of objective scores and subjective scores, comprising: an objective ranking component to generate the objective scores for comments, where the objective scores are independent of the particular user, and a subjective ranking component to generate the subjective scores for comments, where the subjective scores depend on the particular user; and an interface to provide, to a client device associated with the user, the ranked comments for presentation in connection with the particular document. 18. The one or more devices of claim 14 , where the subjective ranking component generates the subjective score for a particular comment based on an indication that the particular user has previously rated the particular comment.