iOS6 will have it built in. It is OK not great.
iOS6 will have it built in. It is OK not great.
And you're referring to iOS6 or turn-by-turn (as mentioned above)?
iOS 6 will have built in turn by turn navigation on iPhone 4s, and new iPad, and because the navigation will fully dependent on Siri function (hence iPhone 4 won't get it, since it lacks Integrated Audience Chip on A4 chip, which is required for Siri to cancel out 90% of noise), you can request a direction on Siri, and navigation will start immediately.
Waze is probably the favorite free navigation app