In your <head>:
<script src='http://tilde.club/~gschueler/js/tildelink.js'></script>
Just type ~ followed by a username, and the script will autolink it to their homepage on tilde.club, like so:
Here's a link to my page: ~gschueler
And many thanks to this man: ~ford
Applies to these tags: <p>, <li>.
Include / char in matches, so you can do this: ~psmith/qlink/
Removed jquery, thanks ~tb