Allow themes to define custom presets?

OK, interesting feature request for you. How about allowing themes to define custom field formats? Given that this module is more-or-less a UI on field.tpl.php, what if a theme (or any module for that matter) wanted to come along and define a field format using a tpl.php, but which could still be configured right alongside other field formats using the semantic fields UI?

This would enable a themer to still define a bunch of field formats in the manner they are used to (field.tpl.php-esque files). Heck, it might even be because it's not possible to express the markup using the config UI available in semantic fields module.