Validate, unit tests

Hey all, Does anyone know enough about "iban" to get the validate_finance tests passing? http://test.pear.php.net:8080/cruisecontrol/buildresults/Validate Alternatively; anyone want to take a stab at RFC822 email address validation by swapping away from One Big Regexp to into disqualifying obviously wrong emails first, step by step; using smaller fragments of the regexp and other code? ie; doing things like: $left_braces = substr_count($email, "("); if ($left_braces > 0) { $left_braces -= substr_count($email, '\('); } if ($left_braces > 0) { $left_braces -= substr_count($email, '" quoted string regexp goes here ( "); } $right_braces = substr_count($email, ")"); if ($right_braces > 0) { $right_braces -= substr_count($email, '\)'); } if ($right_braces > 0) { $right_braces -= substr_count($email, '" quoted string regexp goes here ) "); } if ($left_braces != $right_braces) { return false; // There's a mismatch in ()'s! }