Quick note, more updates on this article will appear soon.
Now available: pdftk for Solaris 11!
pdftk 2.02 from http://pdflabs.com ist now available for Solaris 11 (version 11.3)!
You can merge, split or watermark PDFs from the command line.
To build the package it was necessary to enhance the GCC 4.9.4 package with the Java compiler "gcj".
For OpenIndiana Hipster the compile run is is not yet clean (iconv symbols missing).