I submit I am the highest authority on this specific subject here on slashdot. I grew up in Valdez, AK, the closest town to the spill. I was there when it happened. There is some documentary footage somewhere of myself and my siblings at one of these oil-soaked beaches. I've known friends to go out and do these beach surveys looking for oil, and I've fished and kayaked throughout Prince William Sound.
Firstly I have to say that, unless one goes specifically looking for it, this oil is invisible. The environment has entirely recovered, the salmon run is healthy, and there are as many sea birds, sea otters, and sea lions as there ever have been.
Secondly, the other posters make a very good points about the relative safety of oil tankers vs oil pipelines. I will additionally say that tankers are better protected from deliberate damage than pipelines. I don't know where you're getting your costs from, but I make the average oil tanker to be in the $100M range, and the Trans-Alaska Pipeline System cost $8B.
I don't know if you know about it, but there is also a proposed natural gas pipeline which was intended to run through Canada to the States. Extrapolating from the cost per mile of TAPS, an oil pipeline would probably be in the range of $15B. Setting aside whether it is actually better for the environment, it is a lot easier to suggest that environmental concerns trump economic ones when it's not your $15B.
Nuclear power is probably a good option for Alaska, whereas solar is pretty much off the table. Hopefully one day someone will take advantage of the tidal energy in the Cook Inlet as well, one lobe of that (Turnagain Arm) having the third-highest tides in the world. There are one or two problems though with putting nuclear reactors in geologically active places though, and the NRC isn't exactly putting applications through quickly at the moment.
Personally though, from having witnessed one of the larger oil spills in history, I don't really find them all that concerning.