Most Noticeable Cases of the ECJ

On Monday November 23rd, 2009, the Master in European Litigation of the university of Luxembourg will celebrate its tenth anniversary.

One of various talks to be given throughout the afternoon will present and discuss the Ten Most Noticeable Cases of the European Court of Justice in the Last Decade. No doubt, the speaker will not focus specifically on private international law, but it is my intention to urge him to include at least one.

Now, the next question is of course, Which one?  

I am therefore asking readers: which case (or couple of cases) of the ECJ has been the most noticeable one in the last decade for private international lawyers? and since we got started, what about the most noticeable one since the creation of the Court?