Nakatoir hinted in the Europe forums that Diablo III beta invites might be sent in the future as needed as the developers continue to test server performance in preparation for the release date.
Nakatoir: The recent beta invites were for North American players only as we’re still heavily interested in server performance, and inviting local, low-latency testers is important to achieve the results we need. While we absolutely want to continue to bring in players from around the globe, our intent is always going to be to do what best serves our testing requirements.
So while there may not be any beta invites in this wave for the EU, we will have more information in the following weeks about the global giveaways as well as for regional betas for you. Keep your eyes on the Diablo III front page and forums for this upcoming awesomeness!