Check out this link http://www.unrealengine.com/insiderblog/unreal_engine_3_comes_to_flash
Unreal Engine is now compatible with FLASH !!! Yes, that means Unreal\UDK games running in facebook! Epic are already able to run a complete Unreal Tournament 3 level inside Flash , apparently to a higher quality than on the XBOX, so this is a seriously exciting announcement. But…. and there has to be a ‘but’……this feature is not released yet…coming soon…..