The technically advanced folks (which helicopter pilots generally are) are migrating to the Apple platform. The iPhone/iPod syncs with this platform smoothly
Have been using iBal and WingX on the iPhone for several months. Just took delivery of a new 407 with the PSE PMA8000BT audio panel with integrated bluetooth capability. What an amazing combination. The iPhone does weight & bal, flight planning, NEXRAD wx, METARS, TFR's, airport facilities and much more and the iPhone works beautifully through the headset on the ground and in flight (emergencies only of course). And, if you have music on your iPhone, this will link via bluetooth to the intercom for pax (ands pilot if desired) entertainment. Best of all, no wires. Highly recommended, but some of this works only in the U.S.