The almighty Samsung Galaxy S II has already hit Korea and the UK, but has yet to reveal a date for its U.S. release. Either way, with a recent announcement of a NFC-enabled version heading to the UK in June, the device is certainly ready to set foot on our shores any day now. And what better way to whet our appetites than with an extensive 12-minute long demo to show off its power, speed, and cool new UI features.

The Samsung Galaxy S II is the successor to the wildly popular Galaxy S. So far, it’s been setting its own records with a over 3 million pre-orders to date. It sports a 1.2Ghz dual-core processor, a 4.3-inch Super AMOLED touchscreen covered with Gorilla Glass, an 8-megapixel full HD camera, and the new TouchWiz 4.0 UI running on top of Android 2.3 Gingerbread.

The official video from Samsung below brings over 12-minutes of cheery music and detailed demonstrations of almost every facet of its new TouchWiz user interface. You can expect to see its new 3D graphic effects and motion control, as well as a new customizable home screen with Live Panel. Widget size and layout can be freely customized, unlimited access to web browsing with Flash, and much much more are awaiting you to discover. So go ahead, take a look and let us know what you think.