theoretically, saving a document as a pdf file is easy on mac os x. as a practical matter, the option is grayed out in the print box when i try to do it. and if i go into the output options, it won't allow me to save as pdf from there, either (but it will allow me to save as postscript).

i do remember being able to do this once upon a time. i think it stopped working sometime after i reinstalled with panther.