I Don't think it's a memory cap that is the problem Tex..

Just like the N800 only advertised like 8 or 16GB i think but when 32GB came out they were still usable because they use the same SDHC technology..

The N810 can "read" SD cards all the way to however big they will make them in SDHC.. it just doesn't have the hardware to insert the full size SD into.. (at least this is my understanding)

Now how he Shrunk an SD card to fit it into the mini slot is beyond me....

Just like, for example, an external SD card reader reads just fine in an N810.. if you find some manner of hack that allows you to jam a full size SD into the N810 without killing it I imagine it'd read like any other card. *shrug*