Tried hooking my 4 GB Kingston micro SDHC up to my desktop with a small adapter - didn't work, no surprise, did not expect my reader to be SDHC compatible.
Then tried to hook up my 810 with the SDHC inside -
COULD NOT SEE EITHER DRIVE!!
PANIC
Tried two other computers STILL COULD NOT READ ANYTHING off from the 810! Tried two different 4GB SDHC drives in 810
Power cycled 810, hooked up to PC
NO RESULTS
Removed SDHC card, power cycled now could see internal drive.
Put 4 GB cards back in
WHEW! Their BACK!!
Apparently these things are sensitive as to being plugged in.
Not ready for prime time.