@HarryT: I got my information (or misinformation) about Kindle being able to access Dropbox from this blog:
http://blog.the-ebook-reader.com/201...ks-over-wi-fi/
"How to Use Dropbox with Sony Reader PRS-T1 for Transferring eBooks over Wi-Fi
...
P.S. For those wondering if the Kindle can do this with its web browser, it can’t (not unless you hack it). You can login and view the list of files and everything, but the Kindle cannot open links that trigger new windows, making it impossible to download any files from Dropbox."
I find the site to be very authoritative but if they are wrong you should email them and let them know.