I used to keep lots of stuff in Evernote, and when I switched to org-mode, I did an HTML export from Evernote and then wrote an awful Python script to convert the HTML to org-mode. I'm pretty sure all the binary data appears as links in the exported html.
Sorry, not got it any more. It was a one-time use thing as once I was done with Evernote, I was done for good. It was pretty specific to my use case anyway - as most of the content was tabulated student data.
Very well, then. Thanks for taking the time to respond anyway and for making thoughtful comments on your use case of org-mode, I appreciate your comments a lot!