[gteague]

here's your answer. an a-data 8gb sdhc class2 card was recognized instantly, reported 7.5gb free, and the kindle transfered files from the internal memory to the sd card where i was able to read all the transferred files.

and no, the display never changed to say 'sdhc' instead of 'sd' card.

and no, i'm not going to satisfy those sceptics who would insist i write to every cell on the card and test read/write ... [g]

i somewhat suspected it might work. i have a recording device where the manufacturer originally only said they supported up to 4gb sd and that only from an 'approved' list, but as more and more people found 8gb sdhc cards that worked, they added them to their 'approved cards' list.

[later note: although i didn't think of the log until much later, i believe this is the relevant portion based on the '7902720KiB' item just before the mmc is mounted:]

Nov 25 21:24:03 kernel: FPOW: wake source was POWER_ON_WAKE
Nov 25 21:24:03 kernel: IOC: Woke up with voltage = 3997.
Nov 25 21:24:03 kernel: restarting tasks
Nov 25 21:24:04 syslog: info: PM: PowerManager DONE processing events, exit STATE_M)
Nov 25 21:24:04 syslog: info: PM: doChangePowerState(STATE_M --> STATE_UU)
Nov 25 21:24:04 syslog: info: PM: _getDecisionState(STATE_UU --> STATE_HH)
Nov 25 21:24:05 syslog: info: PM: _getDecisionState(STATE_HH --> STATE_BB)
Nov 25 21:24:05 syslog: info: PM: _getDecisionState(STATE_BB --> STATE_JJ)
Nov 25 21:24:05 syslog: info: PM: _getDecisionState(STATE_JJ --> STATE_A)
Nov 25 21:24:05 syslog: info: PM: prePowerState(M -> A, POWER ON)
Nov 25 21:24:05 syslog: info: PM: powerState(M -> A, POWER ON)
Nov 25 21:24:05 kernel: mmcblk0: mmc0:0001 7902720KiB
Nov 25 21:24:05 kernel: p1
Nov 25 21:24:06 syslog: info: PM: postPowerState(AC) calling waitMMCReadiness()
Nov 25 21:24:06 syslog: info: PM: waitMMCReadiness(): card is present, waiting for it to be mounted...
Nov 25 21:24:06 mmc: sending MMC notification
Nov 25 21:24:07 syslog: info: PM: waitMMCReadiness(9): card is mounted

/guy