What's the simplest way to add a second HTML editor to the post/page admin and show the content in a template?
What I need is something like a custom field that supports html, but I don't need the options to name the field. And I don't need a visual editor like tinyMCE; just html will do.
What I'm thinking of is simply a small text-editor box that sits under the main visual/html editor and shows the resulting html in a template via
<?php if ( function_exists('my_extra_editor_content') ) ... with the text/html in a styleable div.
Plugins like http://wordpress.org/extend/plugins/custom-field-template/ and http://wordpress.org/extend/plugins/developers-custom-fields/ offer too much in terms of functions and choices.