The LA Times, which puts out "We agree with the gays but their tactics are just so uncivil!" editorials every few months just to remind everyone how centrist they are, has an editorial out saying that HRC (you know, the radical, far-left queers' organization) just doesn't get how the legal system works and shouldn't be saying anything against King & Spalding for taking on the defense of DOMA. Every law needs to be defended, and while this one could have been defended by House lawyers, it also needs a $900/hr private lawyer because if a lawyer doesn't bill nine months worth of food stamps per hour then she can't possibly be competent.
Back in the adult conversation about this move, Metro Weekly says that part of the contract K&S signed with the House says that none of their employees can advocate against DOMA, even employees who aren't working on the litigation. This means that lawyers at any of the firm's offices could be prohibited from speaking in favor of DOMA repeal or volunteering with an organization like Lambda Legal that opposes DOMA.