SOE has to announced through their facebook page that they will be adding more servers to meet the demands of European players who received the game this week.
Here's the statement released by Sony Online Entertainment:
"To our EU Customers. We are extremely excited so many of you are enjoying DCUO! Additional server capacity for you folks is being added as fast as possible. Today we are opening up new EU servers that are based in our US Data Center. In the very near future we will add additional servers in our EU based data center. Once that happens, we will move the servers over to that facility. We apologize for any inconvenience, and doing our best to respond to this overwhelming demand."
A few comments on the page says to have the game available on Xbox 360. What could be the reason why they didn't include it as one of its platform? Maybe they do not see enough market from Xbox 360 console gamers.