http://www.mail-archive.com/aseek-users@lists.asplinux.ru/msg01119.html

Good ps to text (or html) converter is here: http://www.nzdl.org/html/prescript.html There are also links to other such tools.

As for converter from rtf or doc format, I know of word2x: http://word2x.alcom.co.uk/ antiword: http://www.winfield.demon.nl/index.html unrtf: http://www.gnu.org/software/unrtf/unrtf.html