I thought so, too, Dan, but I finally found a free program that merges them. It's called PDFill, and from what I saw, it's about the only free-ware available.
It doesn't appear to manipulate PDF files as much as Acrobat will. It does merge them at least, which is a good thing considering I had about 40 individual files to deal with.
Of course, it's probably infected with hordes of spyware and adware.
DJ's the man we love the most