SDIO cards require an interrupt line which is not used in memory cards. I don\'t think SL5500 has that wire.
But there have been a lot of rumors flying around saying that the 5600 onwards are fully wired.
Somebody even claimed to have got it working, but when pushed did\'t provide any source/links to any code.
Part of the problem here is that we have a cf slot as well as an sd slot, so we still have access to stuff like bluetooth, wifi, gps, modem etc. It is less of an incentive to get the sd versions of these cards working.
If we only had an sd slot, I am sure someone would have sorted this by now. Even if that means soldering a wire in the back of the zaurus.
If sharp do include sdio drivers/support on the 6000 or other future models then it will get backported like the usb card reader stuff has.
I used to really crave sdio on my 5500, as my internal flash space was used for a swap file and all my apps were on sd. I would have preferred to put my apps on a faster cf card, and use sd for wifi/bluetooth.
On the cx60 then you have so much internal memory free (96mb) that you don\'t need to use home on an sd card anymore, as it also has 64mb of ram, you don\'t really need the swap file either.