We have a small program to calculate phonon dispersion relations for bulk materials with arbitrary symmetry, but presently we do not plan to release this program, since it is difficult to use and rather complicated. If you want to perform phonon calculations we hence recommend to use the following package developed by Krzysztof Parlinski:
Krzysztof Parlinski E-mail: b8parlin@cyf-kr.edu.pl Fax: +48-12-637-3073 http://wolf.ifj.edu.pl/phononThe program runs under windows and offers a nice graphical user interface. Presently the program is not free.