Westlake Village-based Internet advertising firm ValueClick announced that it has signed representation agreements with GSN.com, 1-800-Schedule, and newspaper publisher Guardian Unlimited. ValueClick will market those three companies to national advertisers and interactive agencies and will also provide access to ValueClick’s ad serving products for those publishers. GSN publishes online entertainment content, 1-800-Schedule is a yellow pages directory for consumers with healthcare providers and Guardian unlimited is a publisher of news in the United Kingdom.