How's the antivirus filtering on mail.wikimedia.org? The less obviously dispensible crap in the mailing list queue, the closer it will be to humanly manageable ...
I'm not sure the spam has abated, but having any mails from real people rejected is a bad thing. (wikien-l, unlike wikitech-l, has many legitimate users who can't work computers. Also, it's a semi-official contact point for blocked users on en:.
Mind you, the queue is going to be a nightmare to deal with. The Nazi spam hasn't abated in the slightest, apparently, with a fresh attack going out about a week ago. Good article from Der Spiegel (in English) on the Nazi virus, which sends people to Spiegel articles (which they're not happy with):
http://service.spiegel.de/cache/international/0,1518,356297,00.html
- d.