From the release:

The Huffington Post, a leading news and opinion site, today announced that it has secured $25 million in funding from Oak Investment Partners, a venture capital firm based in Palo Alto, California. The Huffington Post ("HuffPost") will use the proceeds to invest in the growth of the company and for select and focused acquisitions. The company said it would invest in its technology and infrastructure, increase its in-house advertising capabilities, and continue to expand its content offerings -- including a new investigative journalism initiative and a rollout of local versions of The Huffington Post in select cities. The announcement was made by Arianna Huffington and Kenneth Lerer, co-founders of The Huffington Post.