Adding multiple comment areas on a single page?

Hi all,

I'm building a client project management site.

Here's what I have (or will, shortly): a growing sequence of images, each with some notes text below, added in the page's backend. I'm doing this with a combination of CustomPress and Advanced Custom Fields.

Here's what I want do: add a comment area below each image/note. It's not crucial to that it be handled through WP's commenting system; just that a client can add notes from the frontend.

Can anyone recommend a plugin that'd allow this? Or is it fairly easy to mock up the code?

Thanks!