-(NSString *) reverseString
{
  NSMutableString *reversedStr;
  int len = [self length];

  // Auto released string
  reversedStr = [NSMutableString stringWithCapacity:len];

  // Probably woefully inefficient...
  while (len > 0)
    [reversedStr appendString:
         [NSString stringWithFormat:@"%C", [self characterAtIndex:--len]]];

  return reversedStr;
}