TinyMCEComments works great and the configuration screen is easy to use. Please would you add hooks to modify TinyMCE settings. For example, I add a filter hook to change the editor CSS class and stylesheets:
function mcecomment_getInitJS($debugMode=0) {
//...
$initArray = array ( /* ... */ );
$initArray = apply_filters( 'mcecomments_tiny_mce_before_init', $initArray );
// ...
}