This plug-in uses the code for the built-in RSS widget and modifies it
to prevent reordering and does a bit of processing on the title.

To install, copy event-feed-widget.php into wp-content/plugins/

Suggested styles:

.block-widget_eventsfeed h3 span a img { display: none; }
.block-widget_eventsfeed ul li { margin-bottom: 5px; }
.block-widget_eventsfeed ul li .eventdatewidget { float: left; }
.block-widget_eventsfeed ul li .eventdetailswidget { display: block; margin-left: 55px; }

Since Wordpress is based on GPL code, this is released as GPL too:

http://codex.wordpress.org/License
