iGaming Business – Social gaming company Zynga has launched its Zynga Plus Poker product on social networking website Facebook, according to the Pokernews.com website. The product, which is currently only available to Facebook users in the UK, utilises the network and software of Partypoker, the internet poker brand of online gaming company bwin.party. Zynga announced plans to launch the application on Facebook when it unveiled web and download versions of its ZyngaPlusPoker and ZyngaPlusCasino brands for UK players back in April 2013, as reported by iGaming Business. Zynga, which struck its original deal with Facebook to launch real-money games in…