Originally Posted by cjottawa
Aren't PDB's just PRC's with a different extension? I believe .mobi files are just PRC's with a different extension and Kindle IS .mobi and .prc compatible.
No...most PDB files are eReader files which is a different format that was popular on palm devices for a while. Actually I believe PDB stands for "PalmDataBase" file and can be pretty much any type of file that could be installed on a Palm. But, when most people refer to PDB files as it relates to eBooks, they mean the files that work with the eReader program.
And as stated earlier, the nook will read these files--even supports the encryption. I'm pretty sure that the nook is actually the only e-ink device that will read these files without stripping the DRM and converting.