I've read that including the scripts dynamically may provide some better performance, however i'm not really seeing that on the small local tests I'm doing. I created a jquery plugin to dynamically load other plugins as necessary and am curious as to if this is actually a good idea. The following would be called onready or at the bottom of the page(I can provide the source for the plugin if anyone is interested):

  $.fn.executePlugin(
    'qtip',  // looks in default folder
    {
    required: '/javascript/plugin/easing.js',  // not really required for qtip just testing it
    version: 1,  //used for versioning and caching
    checkelement: '#thumbnail',  // will not include plugin if $(element).length==0
    css: 'page.css',  // include this css file as well with plugin
    cache:true,   // $.ajax will use cache:true
    success:function()  {  // success function to be called after the plugin loads - apply qtip to an element
        $('#thumbnail').qtip(
        {
        content: 'Some basic content for the tooltip', // Give it some content, in this case a simple string
        style: {name:'cream'},
        });                   

    }
});