Sprint's Samsung Galaxy S II variant, the Epic 4G Touch, has been by far the leakiest of all the upcoming U.S. GSII models, and that trend continues today thanks to a leak from Samsung itself. A graphic has been discovered on Samsung's own Mobile Product Training site that's officially outed the Galaxy S II Epic 4G Touch (that's a mouthful) hours ahead of tonight's big reveal. As you can see in the graphic above, some of the Epic 4G Touch's specs include a 4.52-inch Super AMOLED Plus display, 1.2GHz dual-core processor, 4G connectivity, an "ultra-thin" design, and an "Advanced Android Experience." There's no clue yet as to whethat that last feature is referring to TouchWiz or something new altogether.

With this latest leak, we've got a pretty good idea of what Sprint's version of the Galaxy S II is all about, although we're still waiting on an official pricing and launch information. We're sure to learn more about the Epic 4G Touch as well as AT&T and T-Mobile's GSII variants at Samsung's big shindig tonight, so be sure to check back at 6 PM ET for all of our live coverage!

UPDATE: And the leaks continue! The folks at Android Central have been handed a full spec list for the Epic 4G Touch from a person "who will be soon having some hands-on training" with the device. Specs are as follows:

• 4.52-inch Super AMOLED Plus display
• 1.2GHz Exynos dual-core processor
• 8-megapixel camera with HD video capture
• 2-megapixel FFC
• Ultra-thin (9.59mm) design
• Mobile Hotspot for up to eight devices
• WiMAX connectivity
• Sprint ID
• Android 2.3 Gingerbread
• Bluetooth 3.0
• Wi-Fi calling
• Media Hub
• Social Hub
• Samsung Kies Air
• NOVA 2 HD preloaded
• Swype preloaded
• Polaris Office
• AES-256 internal/external hardware encryption
• Optional USB Host Kit for connecting keyboards, cameras, printers, and flash drives
• Optional HDMI adapter
• Multimedia and Car docks will also be available

Via Android Central (1), (2), Samsung Mobile Product Training