From conservative writer Ross Douthat (link):

...Obama has just been elected President of a nation in which he could have been bought and sold as a slave just seven generations ago. I don't think there are any words adequate to the occasion of America electing its first black President, so I'll just say this: This may be a bleak day for the Republican Party and for conservatism, but come what may in the years ahead, it's a great day for our country. Barack Obama deserves congratulations, tonight, but so does the nation he's about to govern: We've come a long, long way.