diff --git a/cake/libs/view/helpers/number.php b/cake/libs/view/helpers/number.php
index 4117736818f..c9226b52468 100644
--- a/cake/libs/view/helpers/number.php
+++ b/cake/libs/view/helpers/number.php
@@ -31,6 +31,39 @@
  */
 class NumberHelper extends AppHelper {
 
+/**
+ * Currencies supported by the helper.  You can add additional currency formats
+ * with NumberHelper::addFormat
+ *
+ * @var array
+ * @access protected
+ **/
+	var $_currencies = array(
+		'USD' => array(
+			'before' => '$', 'after' => 'c', 'zero' => 0, 'places' => 2, 'thousands' => ',',
+			'decimals' => '.', 'negative' => '()', 'escape' => true
+		),
+		'GBP' => array(
+			'before'=>'£', 'after' => 'p', 'zero' => 0, 'places' => 2, 'thousands' => ',',
+			'decimals' => '.', 'negative' => '()','escape' => false
+		),
+		'EUR' => array(
+			'before'=>'€', 'after' => 'c', 'zero' => 0, 'places' => 2, 'thousands' => '.',
+			'decimals' => ',', 'negative' => '()', 'escape' => false
+		)
+	);
+
+/**
+ * Default options for currency formats
+ *
+ * @var array
+ * @access protected
+ **/
+	var $_currencyDefaults = array(
+		'before'=>'', 'after' => '', 'zero' => '0', 'places' => 2, 'thousands' => ',',
+		'decimals' => '.','negative' => '()', 'escape' => true
+	);
+
 /**
  * Formats a number with a level of precision.
  *
@@ -127,27 +160,10 @@ function format($number, $options = false) {
  * @return string Number formatted as a currency.
  */
 	function currency($number, $currency = 'USD', $options = array()) {
-		$default = array(
-			'before'=>'', 'after' => '', 'zero' => '0', 'places' => 2, 'thousands' => ',',
-			'decimals' => '.','negative' => '()', 'escape' => true
-		);
-		$currencies = array(
-			'USD' => array(
-				'before' => '$', 'after' => 'c', 'zero' => 0, 'places' => 2, 'thousands' => ',',
-				'decimals' => '.', 'negative' => '()', 'escape' => true
-			),
-			'GBP' => array(
-				'before'=>'£', 'after' => 'p', 'zero' => 0, 'places' => 2, 'thousands' => ',',
-				'decimals' => '.', 'negative' => '()','escape' => false
-			),
-			'EUR' => array(
-				'before'=>'€', 'after' => 'c', 'zero' => 0, 'places' => 2, 'thousands' => '.',
-				'decimals' => ',', 'negative' => '()', 'escape' => false
-			)
-		);
-
-		if (isset($currencies[$currency])) {
-			$default = $currencies[$currency];
+		$default = $this->_currencyDefaults;
+
+		if (isset($this->_currencies[$currency])) {
+			$default = $this->_currencies[$currency];
 		} elseif (is_string($currency)) {
 			$options['before'] = $currency;
 		}
@@ -184,5 +200,33 @@ function currency($number, $currency = 'USD', $options = array()) {
 		}
 		return $result;
 	}
+
+/**
+ * Add a currency format to the Number helper.  Makes reusing
+ * currency formats easier.
+ *
+ * {{{ $number->addFormat('NOK', array('before' => 'Kr. ')); }}}
+ * 
+ * You can now use `NOK` as a shortform when formatting currency amounts.
+ *
+ * {{{ $number->currency($value, 'NOK'); }}}
+ *
+ * Added formats are merged with the following defaults.
+ *
+ * {{{
+ *	array(
+ *		'before' => '$', 'after' => 'c', 'zero' => 0, 'places' => 2, 'thousands' => ',',
+ *		'decimals' => '.', 'negative' => '()', 'escape' => true
+ *	)
+ * }}}
+ *
+ * @param string $formatName The format name to be used in the future.
+ * @param array $options The array of options for this format.
+ * @return void
+ **/
+	function addFormat($formatName, $options) {
+		$this->_currencies[$formatName] = $options + $this->_currencyDefaults;
+	}
+
 }
 ?>
\ No newline at end of file
diff --git a/cake/tests/cases/libs/view/helpers/number.test.php b/cake/tests/cases/libs/view/helpers/number.test.php
index 99435fe1ba3..9502cdd1a2f 100644
--- a/cake/tests/cases/libs/view/helpers/number.test.php
+++ b/cake/tests/cases/libs/view/helpers/number.test.php
@@ -64,7 +64,7 @@ function endTest() {
  * @access public
  * @return void
  */
-	function testFormatAndCurrency() {
+	function testFormat() {
 		$value = '100100100';
 
 		$result = $this->Number->format($value, '#');
@@ -91,6 +91,8 @@ function testFormatAndCurrency() {
  * @return void
  */
 	function testCurrency() {
+		$value = '100100100';
+
 		$result = $this->Number->currency($value);
 		$expected = '$100,100,100.00';
 		$this->assertEqual($expected, $result);
@@ -139,13 +141,19 @@ function testCurrency() {
  * @return void
  */
 	function testCurrencyAddFormat() {
-		if ($this->skipIf(true, 'NumberHelper::addFormat Not implemented')) {
-			return;
-		}
-		$this->Number->addFormat('NOK',array('before'=>'Kr. '));
-		$result = $this->Number->currency(1000,'NOK');
+		$this->Number->addFormat('NOK', array('before' => 'Kr. '));
+		$result = $this->Number->currency(1000, 'NOK');
 		$expected = 'Kr. 1,000.00';
 		$this->assertEqual($expected,$result);
+
+		$this->Number->addFormat('Other', array('before' => '$$ ', 'after' => 'c!'));
+		$result = $this->Number->currency(0.22, 'Other');
+		$expected = '22c!';
+		$this->assertEqual($expected,$result);
+
+		$result = $this->Number->currency(-10, 'Other');
+		$expected = '($$ 10.00)';
+		$this->assertEqual($expected,$result);
 	}
 
 /**