I just finished the Dutch translation for the Anti-Splog Plugin.
You can download it here:
Use the Export button at the bottom of the page to generate your .po file, rename it to "anti-splog-nl_NL" (without the quotes) and upload it to your wp-content/languages folder.
I'm currently finishing all missing dutch translations for the plugins I'm currently using, if you need a dutch translation for a specific WPMU plugin, just give me a shout.
If you would like to give some points for the translation, this would be appreciated very much.