Tips from the Trademark Insider: Web Design & Trademark Use.

There is nothing inherently wrong with the identification of other party's products on a web page by using their trademarks. Nonetheless, some parties have made inappropriate claims of trademark infringement every time they see one of their marks on another party's page. Sometimes, however, a web site does violate the trademarks of another. Web page designers should avoid trademark usage that might cause confusion among viewers as to the source or sponsorship of the web page. Such use might well constitute trademark infringement.

The Trademark Company