If I may be so bold, if you really want to know what libertarians think of this, I would suggest the Cato institute.
In fact, they wrote a nice piece on the ruling, and on the law.
The law was stupid, and it was good being tossed out. Government has no real business regulating marriage at all, except as a function of an agreement between two parties (or more) similar to a business contract, and that all the "specialness" of marriage should be left to religious (or other) institutions.
And an FYI, the judge ruling was actually appointed by Reagan (one of the most conservative presidents in recent history), and passed by a Democratic congress. In a rather delicious bout of irony, the appointment of said judge was opposed by such people as Pelosi and Lambda Legal.