We just discovered an amazing form that allows anyone to submit files to you from the front end of your website. The plugin is call Frontend Uploader [ This plugin allows your visitors to upload User Generated Content (media and posts/custom-post-types with media).]
You can see the plugin at work here at Claude Model Management
What is Frontend Uploader?
This plugin is a simple way for users to submit content to your site. The plugin uses a set of shortcodes to let you create highly customizable submission forms to your posts and pages. Once the content is submitted, it is held for moderation until you approve it. It’s that easy!