Facebook and Zynga announced today their newly signed five year “strategic” partnership aimed at enhancing social gaming experiences for everyone.

“Facebook was a pioneer in opening their platform in 2007 and in just three years tens of millions of Facebook users play our games every day, from FarmVille and Café World to Treasure Isle and Mafia Wars,” said Mark Pincus, founder and chief executive officer at Zynga. “We are excited about Facebook’s long-term commitment to social gaming and Zynga, and look forward to working with them and other platform providers to bring the best social gaming experience to users worldwide.”

It seems as though the partnership centers around the use of the new Facebook Credits, a form of “currency” used in many Facebook games in order to boost game play or purchase bonus material. Zynga is currently testing Facebook Credits in “select games” and will be expanding the Facebook Credits integration to more of their titles in the near future.

“We are pleased to enter into a new agreement with Zynga to enhance the experience for Facebook users who play Zynga games,” said Sheryl Sandberg, chief operating officer at Facebook. “We look forward to continuing our work with Zynga and all of our developers to increase the opportunities on our platform.”