LibreOffice has a nice command line interface which allows to convert documents into pdf.
For example to convert foo.odt document into foo.pdf use:
soffice -nologo -invisible-convert-to pdf foo.odt
Use the -outdir parameter to specify the output directory
soffice -nologo -invisible-convert-to pdf -outdir ./pdf foo.odt
Or to convert all documents from a directory use:
soffice -invisible -nologo -convert-to pdf *.odp
LibreOffice tries to do what OpenOffice.org never managed well. It tries to make code contributions easy and tries to grow the developer community.
One important thing to attract new developer is to make it easy to compile the code. I think LibreOffice makes it really easy, at least on Ubuntu. Here is the sequence of commands which you need on a Ubuntu 10.04 version.
sudo apt-get build-dep openoffice.org
sudo apt-get install libgnome-vfsmm-2.6-dev
git clone git://anongit.freedesktop.org/libreoffice/bootstrap libo
After some time you find a runable installation of libreoffice in “install/program” directory. Start for example the writer with “./swriter”
I think that is pretty easy and I hope that the LibreOffice team will be successful in attracting new developers. Good luck to the project!