Here's all I want to do (and writing my own plugin to do it has proved to be a huge pain in the keister):
I want a widget that only shows up in the admin dashboard, that basically consists of a text box and a "Submit" button. I want to be able to enter a code into that text box that goes to an external source and collects a bunch of data, using that parsed data to be automatically entered into a post using wp_insert_post - the post data would include tags, custom taxonomies and a custom post type. (All of this exists in a function that I wrote, the parsing of the data and the setting of the tags & terms works just fine. The only thing I need Gravity to provide is the form functionality from the dashboard, because having my plugin hook into save_post is causing headaches saving terms between parents and revisions.)
I don't care if it brings up a more detailed form with pre-populated editable fields, or if it just goes ahead and inserts the post - I'd actually prefer the latter.
So all I really need Gravity to do is call the function I wrote when I click "Submit". (I know it seems like a lot of money to spend for a submit button, but I've already wasted enough time trying to master the Wordpress API - I have a business to run.)