How do I make list of users link to blogs in cust. block?

This is a custom block I wrote. How can I make it then when you click on the persons name you are taken to their blog?

$TmpUser = "";
  $result = db_query("SELECT name FROM {users} ORDER BY name");
  for ($i = 0, $max = db_num_rows($result); $i < $max; $i++) {
    $UserName = db_result($result, $i) . '<br>';
    $TmpUser = $TmpUser . $UserName;
  }
  return $TmpUser;