Also known as iTrip nano, Griffin Technology's new portable FM transmitter iTrip for iPod nano ($50) is a surprising alternative to the company's 2008 version of iTrip. Unlike the earlier, iPod-agnostic model, iTrip nano includes three FM station preset buttons missing from the standard version, more obvious stereo/mono mode labeling on its screen, and a thinner form factor that's suited to the third-generation nano but capable of attachment to…
