I use a Blackberry for work so just bought the GPS software/service for it. Do have it mounted in a 'holder' that gives it some weather protection. Have a Garmin 7xx in the truck which is better at GPS but the bb is a GPS, MP3 player, and cell phone/email device all rolled into one. But it does keep me on a short leash as far as work goes. Though I do make it a point of not taking calls, emails etc. while riding.... another reason why riding is a nice escape from some things.
