CSS3 has support for footnotes in the page module.

http://www.w3.org/TR/2011/WD-css3-gcpm-20111129/#footnotes

It adds a float: footnote; property. From reading that page, I believe this might work, once browser support catches up.

    a::after {
        float: footnote;
        content: attr(href) ' "' attr(title) '"';
    }

There are some other interesting additions:

    title { 
        display: none;
        string-set: title content();
    }
    
    @page { @top-left { content: string(title) }}

This will put the page title in the top left corner of the page margins.