HTC and Facebook, two companies already familiar with one another from their partnership on the ChaCha and Salsa handsets, are reportedly in the midst of jointly developing a new Android smartphone. DigiTimes cites insider sources in reporting that a specially customized Facebook-centric handset is set to launch in the latter half of this year. It's said to feature "a platform exclusive to Facebook," which will facilitate the integration of the social network's full feature set into the phone. Yes, that's all very general at this point, but we're inclined to believe there's some truth to this, following the moderately successful run of the ChaCha / ChaChaCha / Status device, which was handicapped by too little RAM yet still found an audience among lovers of physical keyboards and Facebook messaging.