How can I save matrix order via plugin? I am able to add/delete matrix blocks from within my plugin without any problems. I would like to give the user the ability to drag &amp; drop any field just as you can within the CP.

I can use jQuery UI Sortable to create the functionality no problem. I am curious what/how to call within Craft that manages order so that it is saved.

Thank you for any suggestions!
Matrix blocks are saved in the order they appear in the POST data when saving the "owner" element (the entry, or whatever). So just adding jQuery Sortable to your front-end form will be enough.