If someone says, "So, your guy won." There is no need to reply, "And yours lost." Just say, "He did and now it's time for all of us to get to work." You can let them know how you can understand their disappointment and tell them while you didn't agree, you respected their opinion. (Try not to grimace when you say this.)
We cannot deny the race piece in all of this. But, we don't have to make it a racial issue. President Obama will be everyone's president. It's going to take time for this to sink in and not everyone got the message, yet. Not every taxi driver is going to suddenly stop for all Americans regardless of skin color. Not every employer is going to say, "I think I'll hire that person, he or she looks like they're related to Obama. At your next cocktail party, no need recap the history of slavery and end on an anecdote about something bad that happened to you today. Talk about the good in all of this.
There's going to be a period of adjustment for all of us. Some whites will be inclined to say to blacks, "Aren't you happy?" assuming that all blacks are Democrats and definitely were Obama supporters for obvious reasons. You can reply with a question, "You mean about the election? I think it's great, you?" Or you can make a statement. "Yes, I am. We have a great country." These may not be the words you want to use but the attitude should be upbeat, cheerful and inclusive.
There will be blacks who will assume that whites are not happy about President-elect Obama. Let them tell you that. Be respectful, listen. There's no need to gloat or make a white person feel as though this historic election is about payback. It's not.
Let's enjoy this new day in America and keep it on its pedestal. We can be proud Americans and always gracious, like our president. Oh, yes we can.