@xzibitcool yeah, I tried it and you are correct they are not accepting URL with 'article' in it - wow! that's strange! However they accept name keywords with 'article'. Too bad that your site has it but the thing is, there's still a lot of do follow blogs that will accept your link.
I think it's time to forget about links from comments. Especially write keywords in the field name. Search engines has long been learned to identify these links and they will not bring you much good. Write good comments and paste the link into the body of comments if possible.