thats what I was getting at, everything but cell phones is miniUSB while cell phones are micro, so now the usb cables and car to miniusb that I could share with my phone and gpg can't share anymore.
My current cell phone uses mini USB, so right now I can use all the same cable, but at some point in the future I will not be able to as new devices adopt the micro USB.
FWIW, it might be the case that future GPS and other devices will migrate to micro USB as well.
In any case, if you get the short cables, they aren't very heavy or bulky, so it isn't the end of the world to carry both:
7.5" mini USB cable, $87.5" micro USB cable, $8-john