San Francisco - SocialMedia Networks, the developer of an independent social media advertising network, said on Friday that it has raised $6 million in its second round of funding, co-led by IDG Ventures SF and previous investor Charles River Ventures.

Mill Valley, Calif. - SocialMedia Networks, a provider of tools for developers building applications for online social networks, announced on Thursday that it has raised $3.5 million in its first round of venture capital financing, led by Charles River Ventures.