[Lester Moore]

The only reason they aren't going directly to the type that can be physically implanted into our bodies is that the technology to power devices that track continuously isn't available.

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[Wonder Warthog]

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The Verichip (or similar) will certainly be the "root technology" of whatever "continuous-body-tracking" device that they come up with, but it currently will NOT do "24 hour a day report-back-to-the-office" tracking.

Currently, the chips draw their power to "report back" from the RF pulse the reader machine supplies. There is not currently a power source that that can be implanted into the body to provide the power for the continous radio link that a "report-back" device requires.

The best that the Verichip can currently do is report you when you pass a "reader". You can bet that eventually, such "readers" will be placed in the terminals of every mass transportation service in the country (unless, that is, they come up with a suitable "body power source" before then).