I know my wife has said that she'll be avoiding travelling across the Atlantic on holiday in the near future (we did just that about 3 weeks ago and were thinking of going again for future hols).
Other than that I doubt that it will have much effect on our travelling plans together; she won't fly BA or any American Airline for security fears anyway (this has probably just strengthened that). But this still leaves all the Asian and European carriers to explore the rest of the world with!
I take a more fatalistic approach that if it is going to happen it is going to happen. So if that great ski trip to America comes up this winter I'll be off like a shot regardless of carrier! At the end of the day you are still more likely to get blown up on the tube going to the airport in my mind! :-)