From a post on the Textpattern support forums.

<ul><txp:asy_wondertag><txp:article_custom limit="9999" form="listarticles" section="<txp:section />" category="<txp:category1 />" /></txp:asy_wondertag></ul>

Simple template for adding a MailMan mailing list subscribe form to a page. Found on a mailing list somewhere a long time ago and cleaned up dramatically.

Note: I almost always just include the email and digest options, but I've included the whole spiel for completeness.

<h2>Join the XYZ list</h2>

<form method="post" action="SERVER/mailman/subscribe/LISTNAME">

  <p>
    Your E-mail address: <input type="text" name="email" size="30" value=""><br />
    Your Name (optional): <input type="text" name="fullname" size="30" value=""><br />
  </p>

  <p>You may enter a privacy password below. This provides only mild security, but should<br />
  prevent others from messing with your subscription. <b>Do not use a valuable password</b> as it<br />
  will occasionally be emailed back to you in cleartext.</p>

  <p>If you choose not to enter a password, one will be automatically generated for you, and it will<br />
  be sent to you once you've confirmed your subscription. You can always request a mail-back<br />
  of your password when you edit your personal options.</p>

  <p>
    Password choice: <input type="password" name="pw" size="15"><br />
    Confirm Password: <input type="password" name="pw-conf" size="15">
  </p>

  <p>
    Would you like to receive list mail batched in a daily digest? (You may choose NoMail after you join.)<br />
    <input type="radio" name="digest" value="0" checked> No 
    <input type="radio" name="digest" value="1"> Yes <br />
  </p>
  
  <p><input type="submit" name="email-button" value="Subscribe"></p>

</form>

/nm/dbutil/genlist