Originally Posted By: Russ
It can also use something called a Chirp. Not really sure how useful that would be outside geocaching recreational games.


Chirp is only useful for geocaching.
As you mentioned geocaching: Geocaches may compromise your supply cache site. It might be a good idea to occassionally check if there are geocaches near your supply cache site. Sometimes the GPS reception is bad and some geocachers get carried away when they really want to find a cache. In Germany there has been a "wrecking ball of the month" award for some time because of that.
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If it isn´t broken, it doesn´t have enough features yet.