I have released a release candidate for qpdf 3.0.0. You can find qpdf 3.0.rc1 in the download area. This is a major release that includes support for files over 2 gigabytes, merging and splitting support, and numerous new APIs in the library. For release notes, see http://qpdf.sourceforge.net/files/qpdf-manual.html#ref.release-notes. I expect to do a full 3.0.0 release by mid August.