Ubuntu :: Image Batch Conversion For Publishing?

I have a LaTeX document in one folder, and the images that this documents includes via

Code:
includegraphics{filename}

are in subfolders of this directory. Sometimes I compile this LaTeX file using PDFLaTeX, and others using plain LaTeX. Thus, I would like to have my images in PDF and EPS format, along with its original source, normally an SVG file created with Inkscape. I know I can use Inkscape to convert these files to these formats, but when there are 50 images, it becomes cumbersome/boring/APITA.

I have a small Makefile that reads gnuplot scripts and generates EPS files

Code:
# Makefile to convert into Encapsulated Postscript
# the plots made with GNU Plot. (.plt files)
.PHONY=eps,clean
PLOTS=$(shell ls *.plt 2> /dev/null)

[Code].....