This may sound a bit crazy, and I realize that we're not at this point yet, but have we ruled out using old fashioned mail? For those members who find it difficult to obtain the edit online, perhaps a mail tree could be coordinated? So, for example, one person (with access) would copy the edits onto a physical medium (CDs, DVDs, Blu-Rays, flash drives... whatever) and mail it another. The recipient would then copy the files from the medium before sending it along to the next person in line, and so on and so forth. It's slow, of course, but there it is.