Delta has horrible fees too. Continental doesn't and I have a lot of Continental miles but I don't think they do one way flights. Once they merge with United I should be able to use my CO miles for one way flights on United but I think that's still a long way off.
When I look at a ticket on Delta to the UK it's about $900 or 60K miles (the LOW amount of mileage believe it or not) and about $450 in taxes and fees. It's hardly worth all the hassle of trying to find a flight and using 60k miles to save $450. Bring back Northwest! How I miss them.