17. A computer-implemented method comprising: a) accepting, by a computer system having at least one computer in a network, information about one or more media properties identified by an advertising user; b) determining, by the computer system, a set of one or more taxonomy categories using at least one of the information of the one or more media properties; c) determining, by the computer system, a set of one or more additional media properties using at least one of the determined one or more taxonomy categories; d) presenting, by the computer system, at least one of the set of one or more determined additional media properties to the advertising user as an ad targeting suggestion; e) accepting, by the computer system, an advertiser selection of a suggested additional media property; and f) targeting, by the computer system, the serving of an ad of the advertiser with the selected suggested additional media property.
17. A computer-implemented method comprising: a) accepting, by a computer system having at least one computer in a network, information about one or more media properties identified by an advertising user; b) determining, by the computer system, a set of one or more taxonomy categories using at least one of the information of the one or more media properties; c) determining, by the computer system, a set of one or more additional media properties using at least one of the determined one or more taxonomy categories; d) presenting, by the computer system, at least one of the set of one or more determined additional media properties to the advertising user as an ad targeting suggestion; e) accepting, by the computer system, an advertiser selection of a suggested additional media property; and f) targeting, by the computer system, the serving of an ad of the advertiser with the selected suggested additional media property. 21. The computer-implemented method of claim 17 further comprising: g) accepting, by the computer system, from the advertiser, an offer for association with the selected suggested additional media property.