I have successfully tested the following cards in my plug. Both boot without problems:
- Verbatim SDHC class 6, 16 GB
Manufacturer: 0x27, OEM "PH"
Product name: "SD16G", revision 2.0
Serial number: 2952794544
Manufacturing date: 1/2009
CRC: 0x00, b0 = 0
- Kingston SDHC class 4, 4 GB
Manufacturer: 0x02, OEM "TM"
Product name: "SD04G", revision 5.1
Serial number: 3064348467
Manufacturing date: 11/2009
CRC: 0x00, b0 = 0
I have included the additional info, as shown by the plug at boot, in view of the article whose link drbob49 posted. If you are interested, I can also post total capacity, provided you tell me how you measure it (in order to have meaningful results, all cards should be measured in the same way, I guess).
Best regards,
Alf