Yahoo just signed a platform-level integration deal with Yahoowith Zynga, the developers of famous games like Farmville, Fishville, Zynga Texas Holdem Poker and many more. According to Yahoo’s Developer Blog

“Both the Social APIs and YAP will also allow them to easily tap into Yahoo! user identities (including the aggregated identities we’re enabling across our network), share to Yahoo! Updates, and automatically leverage these new notification channels. (We’ll be providing more details on these new notification channels soon – and they, like so many of our products, will be open for all.)

With these integrations, users who enjoy Zynga games will now have the ability to use their Yahoo! ID and access Zynga’s top titles across Yahoo!’s many products — including Yahoo! Homepage, Yahoo! Toolbar, My Yahoo!, Yahoo! Games, Yahoo! Profiles, and Yahoo! Messenger. YDN is proud to provide the infrastructure enabling these experiences to seamlessly plug into these products.”

This move will certainly bring Zynga on another level since Yahoo is already catering over 600 Million users.