If you want to work in Europe, speaking English with an opportunity to learn another language, your options are the Netherlands, Belgium, Denmark, Sweden & Norway & Nokia (oops, I mean Finland)
Yes, I'd say these kind of "small&weird language" countries are probably easier for an English only person to live in, as most people you meet both in and outside work will know English too. Then again, learning a small language probably won't be that useful, at least professionally. Of course, learning one foreign language makes it easier to learn more, you can develop an almost uncanny ability to figure things out of from context without knowing exactly what all the words mean.
In my experience larger European countries, like France, Germany or Spain have lots of people who only know the local language, so life outside work may get lonely until you learn at least a little of the language. Of course, things can be different if you find work in a place where there are lots of foreigners already, like Sophia Antipolis near Nice in France. The weather is very nice there too...
As for finding work abroad, large international companies often have their job openings concentrated on one page, so finding jobs in those kind of companies should be fairly easy.