Working on a new install of Ubuntu 6.06 and needed the functionality of printing to PDF out of a variety of applications. OpenOffice.org has it built-in, but other apps don't. There's lots of support in Linux for PostScript as the preferred output format, but the magic of invoking pstopdf is magick to me. Enter cups-pdf, a printer driver that generates PDF files. Following the instructions here (especially the hint in comment 15), I was up and running and generating PDFs in ten minutes. Way cool!