The 8700 was kept around for it's sheer popularity (commonly referred to as the best built BlackBerry to date). The 8800 was the would-be replacement for the 8700, but obviously it was too expensive of a device with a love-it/hate-it keyboard and no real feature enhancements (excluding GPS and later Wi-Fi). The 9000 is in this same family, so expect the 8700 to stop being sold (production will end later this year) and the 8820 to still cater to those wanting the bells and whistles (minus 3G) without having the camera.