ComScore, an organization that tracks painful sounding concepts like penetration and market share, just reported that an estimated 21 million Europeans stopped to ask their phone for directions last year. That's up 68 percent from the 12.5 million who did so in 2008. With two-thirds of mobile map users saying they accessed their phone GPS in a moving vehicle, ComScore thinks the stats suggest phones might replace standard PNDs as well. Too soon to tell, perhaps, but judging by recent events, we expect 2010's numbers will be stellar nonetheless. Haven't tried smartphone GPS yourself? Direct yourself to our comparison guides and see what you've been missing.