Bought a 16Gb SDHC class 6 card the other day and put about 5Gb on it.
Put it in the car this morning going to work and for the whole 20 minute journey it said "Please wait accessing"
Coming home it was exactly the same so I decided to leave the ignition on and put it in the drive till eventually it accessed it.
When I pressed "selection" it went up a folder straight away, if I pressed it again to access the whole song list, it went back to the "Please wait accessing" screen for at least 10 minutes until I got p!ssed off with it and turned the bloody thing off.
Anyone using the SD slot? What capacity? And are you having any problems?
Incidentally the couple of songs I did listen to sounded a lot crisper than the songs via the ipod!