JSWolf, I heartily concur! As I see it, the .pdf format (page structure is preserved no matter what printing system you use) is diametrically opposed to the .epub concept of flowable text that adopts itself (via the ebook reader software) to whatever "page" size you are using at the moment.
.pdf is the WORST possible choice -- the last resort -- to convert to epub.
@Alda and @charlski, thanks for the good advice and wishes. Will check on the eligibility to upgrade to ID5. We really want the ability to have one master file of corrections, etc. That being the InDesign file itself.