Rails - Apr 2006 - Submitting sortable_element as part of form

Good evening all...

I''ve been marveling over how easy it is to make amazing drag-sort  
interfaces using sortable_element. My users are really blown away by  
how intuitive and simple these controls are. However, in my current  
project I''m trying to use it in a particular way which has me stumped.

Normally the sortable_element makes an AJAX request whenever it is  
changed. But in this case, my sortable is part of a larger form which  
contains other fields that must be filled in. I want to submit the  
entire form, only when the user is finished, using a normal Submit  
button at the bottom of the form.

Obviously, since the sortable_element is not actually a form field,  
it does not get sent along with the POST request when the user hits  
the submit button. My question: Can anyone tell me the correct way to  
include a representation of the sortable''s contents along with the  
form submission? Do I need to make some kind of observer that  
serializes the sortable_element into a hidden form field (and if so,  
how ;)) or is there a more elegant way?

I would appreciate it very much if someone could point me towards a  
code sample or any other information on this subject.

Thanks much!!
Justin