BlogDex under spam attack

There is yet another bout of URL spam attacks on Blogdex. This time the culprit is a site called Premium Domains. The links are like this - "PremiumDomains - www.site.domain - DOMAINS FOR SALE". The Top Links page of Blogdex has been peppered with these links (almost 21 in number). Someone has got to do something. :(
Update(Dec 02): Read Cameron's reply to this on Blogdex.