The idea that CSS selectors could be used for element creation is awesome. It would be so convenient to write:

    var link = el("a#top.link[src='http://google.com'][data-external='true']")

Instead of:

    var link = document.createElement('a');
    link.setAttribute('id', 'top');
    link.setAttribute('class', 'link'); 
    link.setAttribute('src', 'http://google.com');
    link.dataset.external = 'true'

Someone needs to bring it to W3C forums, otherwise we might end up with this http://lists.w3.org/Archives/Public/www-dom/2011OctDec/0020....