The first IETF draft is posted:
draft-santesson-pkix-certimage-00

The first draft is a result from an initial design process within the editorial team as well as discussions with partners and members of the CA Browser Forum.
This draft will initiate discussion in the PKIX WG whether to accept this as an adopted work item.

Hot discussion topics for this first draft has been

• Image format recommendations
• Need for embedded images
• Usability in web browser UIs
• Legal concerns regarding display of subject organisation logotypes
• Current design considerations are mentioned in the draft. The usability discussion lead to creation of the living problem statement document.