BLUE WONDER You couldn''t swing a cellphone at CES in January without hitting a car stereo with Bluetooth capability. Being able to connect a mobile phone to a head unit wirelessly isn''t just a convenience that commuters crave; in many states, hands-free phone operation behind the wheel is the law, not a choice. JVC''s KD-ADV38 DVD/CD receiver has built-in Bluetooth and will recognize up to five different phones. With voice-recognition phones, stored numbers can be dialed simply by speaking the name of an entry. Also, text messages can be seen on the faceplate.