That script does indeed look interesting; thanks for posting it!  My one
suggestion would be to use pdfedit's -eval option to do away with the
need for an auxiliary file.  Also, I've historically had decent results
from pstotext, which handles PDF files as well these days.

-- 
Aaron M. Ucko, KB1CJC (amu at alum.mit.edu, ucko at debian.org)
http://www.mit.edu/~amu/ | http://stuff.mit.edu/cgi/finger/?amu@monk.mit.edu