Italy is part of the EU, so Italian citizens are entitled to work most places in Europe. If you want to improve your English, I recommend working in England or Ireland instead of the US.
[Edit: removed stuff about the Schengen area]
[Edit: removed stuff about the Schengen area]
Jobs aside, I've loved the last two years I've spent here in Ireland. The people are lovely, as is the country itself. Still on the expensive side, but we're having price corrections along with the recession. :-)