Ever plopped your cellular down next to your laptop? According Georgia Tech researchers, that common scenario could let hackers record almost every sentence you type, all thanks to your smartphone's accelerometer. They've achieved the feat with an impressive 80 percent accuracy using an iPhone 4, and are dubbing the program they've developed, spiPhone. (Although the group initially had fledgling trials with an iPhone 3GS, they discovered the 4's gyroscope aided in data reading.) If the software gets installed onto a mobil