Epinions: Ovens - Consumer-generated reviews, buying tips and advice, ratings, price information, and searchable in a variety of ways from price to product type. - http://www.epinions.com/hmgd-Large_Appliances-All-Ovens
ImproveNet: Wall Ovens - Lists major manufacturers, product lines, experts, and some how-to and consumer advice, so that consumers can see what is on the market. Does not accept payments for listings. - http://www.improvenet.com/ext/productshowcase/PS_3.html?CID=27