Once the widget is added to your sidebar you may easily configure it to provide a display of recent comments with comment author avatars. The options are:
The style of the output may be controlled with simple CSS rules that need to be included in your styles.css template file.
The container (i.e. <ul> or <table>) has the id recentcomments (use CSS .recentcomments).
List items (i.e. <li>) have the class recentcomments (use CSS #recentcomments).