news comment spam?

here at secgeeks we have our spam filters configured which learn by the time.recently i have seen some comment on this site which are at the first glance,appears to be a generic comment containing news but in the reality they contents URLs to the spam site.
spammers are working hard on new techniques like MP3,PDF and now this news comment spam but i dont think all such things will work properly.
oh and did i mention that on my efax account too i recive lots of spam?so security folks,u should try adding efax protection support in your antispam solutions.