I enjoyed Giles' Palm Art a lot, and wanted to have a go at making some of my own, but unfortunately there's no readily available software to transfer images from the Palm to Linux. I use DiddleBug for doodling on the Palm, so I went and had a look at the source code and figured out how to uncompress the images.
The result is this Perl script. It loads the DiddleBug database in the current directory and spits out PNG images for each image in the database. Sample usage might be:
% pilot-xfer -f DiddleBugDB % perl diddle.pl Written 3 PNG images
You'll need Perl installed, and the Palm::PDB module and friends, and the "convert" program from the ImageMagick suite. If you're using Debian, as I do, this can be done easily via:
% apt-get install libpalm-perl imagemagick
That's it! Now you can doodle away to your heart's content. I make no warranty and offer no support for this software, but you're free to use it how you want.