LetsTalk has this morning dropped its price for the HTC Thunderbolt from $200 all the way down to the so-far unmatched level of $175. This applies when bought with the obligatory two-year service plan and will be available to all willing customers, whether they be new to Verizon, adding an extra line, or upgrading their current phone. It also betters Amazon's $180 price in one other important aspect: Amazon's Thunderbolts are on back order at