I visited the site a few times last week without problems. I believe that there is a secondary domain being set up in Canada, but it should not effect this one. There may have been frequent construction happening on the garritan.com domain also, but I have no idea if this is the case.
Is the site still down for you?
"If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away." – Henry Thoreau