[Plugin: Custom Field Template] Suggested Data Type: Image Upload

It would be great to be able to add to a template a field that is an image upload. I’m imagining a text box with a button on the right. The user can click the button and pick an image from their hard drive, which then uploads the image; when the user saves the post, the URL of the image (either an absolute path or a relative path) would be saved in a custom field.