Garmin has taken on a new line of devices with the GPSMAP 640 that not only has road navigation but a marine chart plotter as well. It comes preloaded with their BlueChart g2 data and City Navigator NT for North America. Of course, the case is waterproof and it has a 5.2-inch WVGA touchscreen and an intuitive interface. The 640 can receive XM WX satellite weather data in marine mode and XM NavTraffic information in automotive mode. Expect the GPSMAP in Q1 2009 with a MSRP of $1,199.99.