Chris Morriss wrote:

I would be perfectly happy to use solid-state removable memory to
carry audio for in-car use, but CF is still too expensive, and the
pins on the connector can too easily get damaged. I'm sure
replaceable media using SS memory will become available in a format
to suit automotive use, but I honestly don't believe we have it yet.

(And the joke iPOD is just an item for fashion victims).

Why a joke? Seems like the perfect in-car source to me.