3.3 is not the latest release, from what I can tell, but you can still download it:
Code:
$ wget http://måns.dk/PS/PuppyStudio3.3-rt.iso
You can find all PupStudio images by following links provided here:
http://puppylinux.org/wikka/PuppyStudio
which points here:
http://puppystudio.tiddlyspot.com/
And then you have only to click the download link you desire.
