I have a 35mb PDF file with 130 pages that I need to put online so that people can print off different sections from it each week.
I host the P
PDF documents can be optimized for downloading through the web, this process is known as PDF Linearization. If you have control over the PDF files you are going to use, you could try to optimize them as linearized PDF files. There are many tools that can help you on this task, just to name a few:
Another option could be to split your file in sections and only deliver each section to its "owner". For the rest of the information, you can put bookmarks linking to the other sections, so that they can be retrieved also if needed. For example:

If the linearization was not enough and you do not have a way to know how to split the file, you could try to split it by page numbers and create bookmarks like these:
-Pages 1-100
-Pages 101-200
-Pages 201-300
...
-Pages 901-1000
-All pages*
The last bookmark is for the ambitious guy that wants to have the whole thing by all means.
And of course you can combine the two approaches and deliver each section as a linearized PDF.