I talked to Callum Rowley the PR
Manager at Gameloft and asked why BackStab hadn't been released yet as it was past the 30 days.
He responded quickly and pointed out that while the Xperia Play titles do have 30 day of exclusivity, it does not mean the game will hit other devices immediately after. Only once the game was ready would it be released as they prefer not to rush a release to ensure a quality title.
He also mentioned that BackStab would be demonstrated on the iPad 2 at E3 and they will likely have news of a release date for iOS and Android following shortly after.