Thanks for the reply, gazumped! I would love to be able to comment on the notes in Evernote, but as long as they were submitted through Scannable, I am unable to comment on or expand the note at all. (Scannable inputted notes are locked, and can't be altered.) I don't believe it's possible to add extra notes on an event or person, as you suggested. If I'm wrong, please tell me how!
I love Scannable and use it all the time. However, looking back at the business cards I've scanned, I often have no idea who the person is or where I met them. I really wish there were a way to take notes on business cards as I scan them in - for instance, "introduce David to John" or "will be at next month's event". Tags really don't cover this. Thanks for taking feedback!