autocompleted text field for taxonomy term selection

Would you be interested in adding an autocompleted text field for taxonomy term selection?

You can enter term names, $form_state['values']['foo'] will contain the term ids. In #vocabulary you can add the machine name of the taxonomy vocabulary to use.

We have some code ready but not a real FAPI element yet. It's heavily based on how the Views 'has taxonomy terms' filter does it.
If you're interested to add this to the project then let me know and I'll provide a patch.