We could implement the InstantCommons without much trouble, I'm sure. If people have a lot of need to use those images this could make sense. And/or if people want to upload large files that are related to more than one person, maybe Wikimedia Commons would be a better host for them.
This would be for the inline images in the biographies. For images tagged to people, used as thumbnails or backgrounds, viewed in slideshows (forthcoming), useable as e-cards, etc., they'd need to be uploaded here.