I did get my entire motorcycle ride yesterday at 10Hz, plus the internal GPS sentences, plus the J1850 chatter from my Harley using my own minigpsd, all in KMZ files.

I'm still tweaking and tuning things a bit, but it does work, and I expect to have another alpha mingpsd out shortly. (It automatically logs the data as XML comments within KML/KMZ files so an excursion looks something like a fence where the height represents speed).