The patch is working quite nicely for me - in 12 weeks, only one spammer got through (and ended very quickly on my blacklist). So I extracted my code into a separate module, reducing the size of the patch for the original multiping module.
You can get it on my Drupal page. Don't forget: It is not enough to install the module, you have to apply the patch included to the original trackback module.

Since several people asked: Here is a patch (containing my trackback sanity checks) against the trackback module. Mind that this is just a draft, configuration of the behaviour has to be done in the source code. The preconfigured behaviour is to publish trackbacks which fulfill the sanity checks; all other trackback requests receive an error reply. You have been warned ;)

The update of the Multiping module for Drupal is now available on this site! I've been running it for three weeks now and it didn't cause any trouble, so I hope it will work fine on your site(s), too.
I've been experiencing some trackback spam floods recently, so I'm trying some new means of filtering:

• The server mentioned in the trackback link must resolve to an IP in the same subnet as the IP sending the trackback
• The page to which the trackback link refers must contain the URL of my site

Please help me testing this scheme: Write a blog entry with a link to my page, and send a trackback here. If the trackback doesn't get through, please drop a comment here. I'm curious whether this will work...

I haven't done a lot of Typo3 hacking yet - but nevertheless, here is what I have accomplished:

Typo3 Mailman sync

This is a very rough script to synchronize a Typo3 frontend user group with a Mailman mailing list. The script adds all FE users (having a mail address) belonging to a given FE group to a Mailman mailinglist (and removes all non-members from it). The script has no direct Typo3 integration, it has to be run manually or by a cron job.
It is not very user-friendly, but well... it works for me :-) You can get it here.

Goboard tags - a means to display go boards

I started writing this piece of code in 2003 for the DGoB forum. The forum initially used YaBBse, until it migrated to the Simple Machines Forum (SMF) system. I took the opportunity to create a decent module, which should be suitable for automatic installation.

Multiping

A replacement for the ping module of Drupal. It allows pinging of multiple sites (configurable via a web interface). If a site is unreachable, the ping request will be sent again during the next cron.php run.

Version 1.1 introduces several enhancements: It is possible to automatically select the pinged sites by the taxonomy terms assigned to the node. The sites can now be pinged during the cron run or immediately after a node submission. Finally, if a ping request failed, the retry time is increased exponentially in order to avoid "hammering" the service.

In January 2005, I started patching the Mailman mailinglist manager in order to allow PGP/GPG-encrypted mailinglists.

My latest patch for mailman 2.1.5 can be found here (detached sig).

The patch attracted the interest of a couple of people; now, there is a development mailinglist where new changes, ideas, ... are discussed.