I decided to take a look at the latest Eurobarometer (autumn 2007) to see how the Irish place themselves with regard to the EU and European institutions. To make a very long story short, the Irish do not appear to be particularly Euro-skeptic, at least not in the British meaning of the term. See for instance this map:
Note the difference between Ireland and the UK!
The Irish also have higher trust for the EU than national political institutions:
However, when asked about political efficacy, the Irish tend to think that their voice is not heard in the EU: