Here's is a Mollom spam filter plugin for Laconica.

To enable, download MollomPlugin.php
http://gitorious.org/laconica-mollom-plugin/mainline/trees/master

Place this in the plugins "local" folder of your laconica installation

Add the following to your config.php
<?php
addPlugin('Mollom');

$config['mollom']['public_key'] = '...';
$config['mollom']['private_key'] = ..
$config['mollom']['servers'] = array('http://88.151.243.81', 'http://82.103.131.136');

?>

replace '...' with your own public and private keys for your site, which you can get from mollom.com

If you're using this plugin, i'd love to know about it -- shiny@cpan.org or shiny on freenode.

Note: it doesn't currenly save which servers are active on the mollom service - this coming very soon.