I'm not sure what it's like in Scandinavia, but $150/hr would be an exceptional rate in the US for someone with the skills you describe. Most contract programmers with that resume are more like better paid temp workers who make $25-60/hr.
You can't survive in Europe if you get paid in USD, these days.
About the tech, for that kind of money it's mostly Java, PHP and C++, with a bit of perl, Oracle PL/SQL. We're old fashioned :) but for the past few years C#, .NET, and javascript are making a splendid coming out, and there's always demand for ObjectiveC (iOS mostly).
Now don't take my words for truth about the tech on the market, I'm super biased by the company I've worked in and their customers. But in any case it's nothing compared to what you earn if you're good enough with Excel, Powerpoint and absolutely nothing else. The more tech you know, the less you bill is the rule of thumb at least in the French consulting business.
Bear in mind you will need to allow time to search for new work too.