Remember that JBL MS-8 you plopped atop your must-have list back in March? No? Fret not, as quite a bit has happened in the meantime. Today, however, the aforesaid outfit is shipping its new in-car digital processor, which remains a bit of a mystery device that magically improves audio quality for up to four seating positions simultaneously. JBL assures us that the real secret sauce lies in the software, and with it, people will apparently "never experience music in their vehicle the same way again." This all sounds a bit Bose-ish to us, but at least we're told the spe