What's the one biggest hurdle to throwing out your dedicated GPS nav unit and going ahead with the free turn-by-turn navigation offered by your smartphone? If your answer was that most phones don't have the great big screens or easy installation systems of some satnav devices, look out, because Nokia's about to shake up your world all over again. Alpine has just announced its partnership with the Finnish giant aimed at integrating Nokia handsets -- complete with free Ovi Maps navigation -- into car dashboard systems. Yes, that
