Ford's outfitted the Fusion Energi with a dizzying array of driver-assist tech, including a lane-keeping system, adaptive cruise control, driver alert system, active park assist, rear camera, blind-spot indicator system with cross-traffic alert and pull-drift compensation (phew).

ENGADGET: Ford Fusion Energi plug-in hybrid test drive (video)

One indicator to watch is the volume of housing traffic and sales.

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Online companies pounce on every whisper or cryptic comment from Google about how it ranks pages as an indicator--up or down--of how online traffic will flow for millions of Web sites.

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Traffic data is included here for free, though the phone warns you that you may wind up seeing a few ads mixed in from time to time to cover it. (We didn't see any during the course of this review.) If traffic is noticed anywhere along or near your route the phone will throw up an indicator to warn you.

ENGADGET: Garmin-Asus Garminfone review