Advertising and Social Networking Sites

According to TechDirt, it's common for companies to not know each and every place online where their advertisements appear. Advertisers are being to notice that their ads sometimes appear on profile pages for organizations or initiatives they oppose, and some are beginning to withdraw from sites featuring user-generated content.
This has not stopped the big media companies from buying up smaller social networking sites, according to Giga Om. He says that "This is a strategy not without risk. Big media companies have to leave the acquired, and their communities, alone."

Stumble Upon is an interesting take on social networking. Joshua Porter of Bokardo looks at Del.icio.us and feature creep in social web applications.