<?php
// what you got from Scott
wp_signon(array('
    user_login'=>$_POST['user_login'],
    'user_password'=>$_POST['password'],
    'remember'=>(isset($_POST['remember'])?true:false)));

// Something i saved yesterday from chat
    wp_signon(array(
        'user_login'=>$_POST['user_login'],
        'user_password'=>$_POST['password'],
        'remember'=>(isset($_POST['remember'])?true:false))
    );
    $user = get_userdata($user_id);
    $password = wp_generate_password();
    $userinfo = array(
        'ID'=>0,
        'user_pass'=>$password,
        'user_login'=>$_POST['user_login'],
        'user_email'=>$_POST['user_email'],
        'user_url'=>$_POST['user_url']
    );
    $user = wp_insert_user($userinfo);
    $user = get_userdata($user);
    update_usermeta($user,'forum_location',$_POST['from']);
    update_usermeta($user,'forum_occupation',$_POST['occ']);
    update_usermeta($user,'forum_interests',$_POST['interest']);

    $to = $user->user_email;
    $subject = get_bloginfo('sitename') . ': New Password';
    $message = 'Your username is: ' . $user->user_login . '\n';
    $message .= 'Your password is: ' . $password . '\n';
    $message .= get_bloginfo('wpurl');
    $message .= '/wp-login.php';
    $message .= 'Wenn Sich bei der angegebenen Adresse einloggen, k&ouml;nnen Sie Ihr Passwort jeder Zeit &auml;ndern.';
    $$attachments = '';
    wp_mail($to, $subject, $message, $headers, $attachments);
?>