Electronic Publishing Using Free Software?

Arkaein asks: "I am planning on electronically self publishing a book that I want to write, typeset, and create diagrams for on my Linux PC. Most of the diagrams for the book will be generated through scripted custom software, and I want the final product to be as compact as possible. I would like some advice from Slashdot on what Free Software tools I should use, with an emphasis on scripting efficiency. I am planning on using hyperlinked PDF for the final book format. To date I have used LateX for writing basic papers and have created vector images using Xfig and raster images edited using The GIMP. I used dvipdfm to convert my results into PDF. What I haven't done is create a hyperlinked PDF document, or generated xfig, postscript or any other vector image format through software, or worked on any document project of this magnitude before. I have thought about using raster images, my current software used for web content similar to what will go into the book creates raster images which I convert to PNG, this works well because the images are fairly simple diagrams with few colors and compress very well. I estimate that the 200 or so images I need for my book would require about 10K each as high-res PNGs for a total of 2 MB. This sounds acceptable, but would probably be smaller with higher image quality in vector format. Are LaTeX, Xfig and dvipdfm the answers, or do I need to look in other directions?"