Front end post editing using a form

I have a custom-post type with the standard meta boxes and some custom fields. How could I edit a post through a form in the frontend?

If you want to edit an existing post, try my Front-end Editor plugin.

If you want to create new posts, try one of these:

• http://wordpress.org/extend/plugins/sidebar-post/
• http://wordpress.org/extend/plugins/tdo-mini-forms/
• http://www.deliciousdays.com/cforms-plugin/
• http://wordpress.org/extend/plugins/posthaste