In the great tradition of minimising the barrior to only using free software the FSF have announced GNU PDF. This is a fully feartured PDF library for apps to view or create PDFs so you should see an Acrobat killer in your favourite distro sometime.
We use Acrobat in work and don’t get anything like our moneys worth, we basically use it to annotate PDFs that come back from translators and print to PDF. I have used PDFCreator for one of those tasks, but the other is more of a hurdle.
PDF is a pretty good open standard. I would be very glad to see a GPL3 library that fully implements all its features.