There seems to be no way to list all of the posts you've saved as memorable. You can list all the tags you've assigned to classify your memories, and you can list all the posts under a given tag, but there's no single direct unfiltered view.

My current workaround is to assign the "memory" tag to every post. The drawback is that if I ever forget to do that, it'll be hard to notice that the post in question is missing.