Today, P2P lending marketplace Prosper announced an additional $20 million in financing from DAG Ventures and Meritech Capital Partners. This is Prosper’s third round of funding, and brings the total in venture capital raised by the company to $40 million.

This makes Prosper the most heavily-financed P2P lending site in the world, pulling ahead of Zopa, who was the previous leader at $34 million after theyannounced a third round of $13 million back in March.

Meritech describes itself on its web site as “a leading provider of late-stage venture capital”, and goes on to boast expertise in, among other things, “IPO market timing”. DAG Ventures is less specific about their objectives.

Also included in Prosper’s announcement was an updated membership count of 330,000, and a total amount of loans funded of $70 million.

Update 5/29/2011: Prosper has since received several additional rounds of venture capital, its latest round being in April of 2010.

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