As far as car mounts go, the zaurus cradle makes a really good one if it can be fixed in a suitable location.
I have a UKk Ford Focus, and I took out the ash tray, which just happens to be exactly the same size as the base of the 5500 cradle, I couldn\'t have wished for a better fit. it is tight enough to not need any extra suport, or velcro.
It also happens to be just above the cig lighter socket, so power is nearby.
First off, dismantle the cradle, remove the usb wire by unplugging the connector, keep it in case you need to use it again later. I wirelessly sync, so don\'t need it.
Find an old 5 volt phone charger that plugs into cigarette lighter socket. Cut off the plug and solder on a zaurus style power plug, being extra careful to et the polarity correct.
Attach this to the back of the cradle, attach a zthin serial cable to the serial breakout on the back of the cradle. The little plastic lugs on the zthin cable have to be removed with a sharp knife so it will fit.
If you remove the ford double size radio, there is ample space to route the serial cable and power cable behind it, and ample space to work.
Route the serial cable to the glovebox which houses the gps device, an external antena comes from this and magnetically attaches to the roof.
Now insert the cradle into the hole left by the ashtray (making sure Saddam isn\'t already in there, he does like holes )
nozcar1.jpg is the cradle in the ashtray with all cables connected, you can see the power cable in the cig lighter socket, but the gps cable is hidden.
zcar1.jpg is the zaurus in the cradle running qpegps.
http://homepage.ntlworld.com/pssmith/The main beauty of this, is you just whack the zaurus into the cradle and it coneects to the power and gps, without any further messing with wires as they are attached to the rear of the cradle.
Tested as stable by driving over speed ramps (in empty private car park incase any plod are reading this) at 40mph and the zaurus stayed put and carried on telling me where I was.
Optionaly paint the zaurus black to match the dashboard (and car) colour.
Selling the car? no problem, just remove the cables and re-insert the ash tray and no one will ever know, just make sure you buy another black car with a \"zaurus cradle sized ash tray\" other wise black zaurus will no longer match, and cradle will no longer fit.
Peter