I'm loving the fact that Custom Fields are available as a Post Fields selection! With WP-Types and GF + Custom Post Types, this is a killer way to handle some pretty sophisticated structured data in WordPress.
I thought I'd share a tip I learned in case anyone else has a problem with some fields not showing in the drop down field "Select an Existing Custom Field"
Make sure you create a post with all of the fields populated. This is especially true with custom post types with custom field groups.
After you do, all of the custom fields will appear.
Thanks for all of your great work on GF.
