We are pleased to announce that the Core API now supports:

• Updating comments via the API—Using the comment ID, you can update the body or the pinned status of the comment.
• Controlling whether a comment is pinned in the conversation—A pinned comment is displayed in the pinned comments link within the conversation UI. You can mark a comment as pinned via the API using the new is_pinned field, which is available when adding or updating a comment and in all comment responses.

Let us know if you have any feedback in the comments below, no pun intended.