Faith makes it possible to achieve that which man's mind can conceive and believe.
To make a widget automatically load it's content you just need to set data-widgster-autoload attribute and provide an url.
data-widgster-load="server/ajax_widget.php" data-widgster-autoload="true"
data-widgster-autoload may be set to an integer value. If set, for example, to 2000 will refresh widget every 2 seconds.