This weekend the European Union (EU) is holding elections for the European Parliament (EP). Or rather, the 27 member states are holding 27 individual elections for their delegations (members are called "MEPs") to the EP. Most countries will be voting on June 7th but the UK and Netherlands voted on the 4th and a trickle of countries voted yesterday and today. Most of the countries use proportional representation which will tend to produce MEPs from a wide variety of parties. When the ballots are counted there will be a 736 member parliament ready to take up their offices in Brussels and vote in Strasbourg (a monument to French pettiness).
So far, the results from the Netherlands seem to indicate big gains for the extreme right with the center right winning the most seats. The far right, anti-Islamic "Freedom Party" had no seats in the 2004 EP but won 16.9% of the vote. I would caution against interpreting this as a signal that the Netherlands is on the verge of becoming a far right bastion. Far right parties in Europe typically win between 5 and 20% of the vote and tend to do best in "second order elections" like the EP.