I seem to need this code all the time. It creates a function for displaying which wordpress theme template is currently being used.

CurrentTemplateName.php

<?php
/** 
 * Add to your functions.php
 * from here: http://wordpress.stackexchange.com/questions/10537/get-name-of-the-current-template-file
 */

add_filter( 'template_include', 'var_template_include', 1000 );
function var_template_include( $t ){
    $GLOBALS['current_theme_template'] = basename($t);
    return $t;
}

function get_current_template( $echo = false ) {
    if( !isset( $GLOBALS['current_theme_template'] ) )
        return false;
    if( $echo )
        echo $GLOBALS['current_theme_template'];
    else
        return $GLOBALS['current_theme_template'];
}