On August 20th, at 4:30PM Eastern Standard Time, Samsung will show off the Epic 4G smartphone on their television support website. Why is this of interest to you? Simply because the last two times the company did such a thing -- for the Vibrant and Captivate, respectively -- these infomercials all but coincided with the phones' planned release date. We wouldn't go around making any wagers if we were you, but if someone asks you when we might see a Galaxy S with a physical keyboard, you'll be able to make a ballpark estimate instead of pulling numbers out of your hat. Don't know what we're on about? Read our full preview of the Hummingbird-laden device.