This is not quite what you asked, but I thought maybe it'd help somebody else in a related fashion. Here's what I do to share files and folders between my PDN and my computers wirelessly (because I'm too lazy to constantly mess with swapping out SD cards and USB cables).Sharing out the PDN for PC access:Option 1 - Install and use "On Air" from the Marketplace. "On Air" turns your PDN into an Appletalk/WebDAV/FTP server, depending on your choice, and you use the appropriate client from your PC/Mac/LINUX system to access it.Option 2 - Install and use "SwiFTP" from the Marketplace. "SwiFTP" turns your PDN into an FTP server. Use any FTP client to connect to it.Sharing out folders on PC's for PDN access:To go the other way, if you'd prefer, share out the folders you want on your Windows PC using the usual Windows filesharing. Install "Astro File Manager." Install the "Astro SMB Module" plug-in for the "Astro File Manager." Using "Astro File Manager" on your PDN, you can now connect to Windows shares and copy and paste files and folders between them.Going from Calibre on your PC to Aldiko on the PDN:Use one of the methods above to share out your PC or your PDN. Locate your "Calibre Library" folder. The default install of Calibre would have placed it inside your user profile folder. Within the "Calibre Library" folder will be subfolders containing your books and converted books. To transfer, copy the subfolder(s) for the books you want from "Calibre Library" to the PDN's SD card's "ebooks/import" folder. Bear in mind that, if you did a conversion, the original source file will also still be in these folders, so, if you don't want to waste time and space, you only need to move over the EPUB and its accompanying cover.jpg file (which is what Aldiko uses for the cover) and put them together in subdirectories under "ebooks/import." Then open Aldiko in the PDN and run the import process.Oh yeah...Calibre itself has a server mode that lets it act like a webserver and allows you to access (download?) its books from any web browser, but it didn't quite work for me. Might be the browser I tried (Xscope) or something. I was able to see a list of all the books in my collection but was not able to access any of them. I might look back into it someday but I preferred the above methods anyway because they are more general use (for books, music, videos, apk, anything).