In other news, I finally figured out the technical bit to allow character portraits separately from user avatars. If you'd like to upload a picture of your PC, you can do so by going to your character sheet, clicking Edit, and selecting an image in the Attached Images menu (it's hiding out near the bottom). A thumbnail of the image you select will show up next to your character's name on the , and the full-size version will show up next to your character's public description.
As always, let me know if you have any questions, and enjoy!