WireFly has released a video review of the upcoming BlackBerry Curve 8520 that has been rumored to be released  sometime in August.    The Curve 8520, code name Gemini, is the first BlackBerry to sport the new optical trackpad as compared to the trackball that we have come to love (and hate when they get all gummed up).  The Curve 8520 is a bit smaller then the Curve 8900 and will come in two colors, black and a very light blue.