With Linux, you can use SDHC card without need to pay in addition almost price of the new card to be able to use it ;-)

How do you boot linux on it (zire72) since PalmOS can't read that card? Is it possible to store the kernel image, and also initrd, into the handheld's RAM using PalmOS?

Miska mentions this in his blog:

"One frequently asked question is about SDHC support. We have tested snua's SDHC in my Palm TX. As it is not supported by PalmOS, I had to boot Linux from normal card, but with running Linux I have been able to use SDHC card, so it seems like Linux can be solution if you want to use bigger cards ;-)"

I don't understand how this works. Do you switch cards after booting off of a normal SD? Can someone elaborate, please?