Autocomplete / tags and AJAX

Just a quick question / request -- any chance that the new (and wonderful) autocomplete and tags fields will eventually have the same AJAX capabilities as a regular AJAX request?

For example, the US state of Texas is divided into 254 counties.

Something like this would help get all the relevant counties from a table with all counties for every state in the US:

new DataTable.Editor({
    ajax: '/api/data',
    fields: [{
        label: 'Counties:',
        name: 'county',
        type: 'tags',
        ajax: {
            url: '/api/counties',
            data: {
                state: 'Texas'
            }
    }],
    // ...
})