The Irish voted against the Lisbon Treaty, which is really the EU Constitution. This is likely a completely futile gesture, but I'm glad we can still count on the Irish to make futile gestures.
The reason it may be futile is because the Eurocrats don't seem to be capable of accepting no. Either vote yes, or they will come back and make you vote again. Or they will use your own government against you, forcing your institutions to accept the very thing you went and voted against.
The whole 'voting until you vote they way we tell you to' happened a lot in communist countries. I wouldn't be surprised to find Euro funded re-education camps coming soon.