The main problem that concerns me is that failing to dismount a truecrypt volume before removing the card (or use USB cable) will make it impossible to remount the card.

The other problem/opportunity I'd like to consider is some sort of interface to file manager - since it supports internal filesystem, memory cards, bluetooth and samba it ought to be possible to add truecrypt volumes.

I'll have to read up on LUKS too.

So many things to do, so little time.....