Interestingly enough, the CBS News website has reprinted an editorial from the National Review opposing gay marriage. 

And people still argue that there is a liberal slant to major media?

The editorial itself is not very inflammatory; in fact, it's downright mild considering the source.

I still think their call for an amendment is hopeless.  Recent polls of Senators suggest such a measure might not even get 50 votes, let alone the supermajority needed.

The article's main concern however is this:

The leading criticism of the Federal Marriage Amendment is not, however, that it is inconsistent with states’ rights. It is that it would "write discrimination into the Constitution." We have not addressed that objection because the people we have in mind already know that marriage, and its requirement of sexual complementarity, are not discriminatory. But it is nonetheless worth keeping in mind that this claim of discrimination is being made, and that many people, especially in the legal academy, believe it. If the Federal Marriage Amendment is discriminatory, it can only be because traditional marriage laws are discriminatory — and if that is the case, then it should not take much more argument to get the federal courts to step in. The premises for the federal courts to impose same-sex marriage are being put in place.

I was surprised at this focus, but I do believe that they are wrong about discrimination.  Marriage is first and foremeost a cultural institution.  From government's point of view, there is not moral component to it.  Therefore, limiting who has access to it is most definitely discrimination.

The link:  http://www.cbsnews.com/stories/2006/06/07/opinion/main1690563.shtml