Just as a successful TV show can yield spin-offs, apparently so it is with mobile phones. Looking to capitalize on the success of its HTC Desire, which launched earlier this year to positive reviews, HTC has unveiled the Desire HD and Desire Z. The Desire HD features a larger 4.3” display and is the first phone to be powered by the new 1GHz Qualcomm 8255 Snapdragon processor. Meanwhile, the Desire Z is a QWERTY slider and is the first to be powered by the 800MHz Qualcomm 7230 processor. In addition to the new hardware, HTC also announced an enhanced HTC Sense experience centered around a new HTCSense.com service that lets users backup, lock, locate and wipe data from their phone remotely.