I've just been surfing around and through a tip on the Gaeilge mailing lists found and amazing Irish website. I apologise if this has already been noted on this site but I have never seen it, it is called "Beo" and can be found at: www.beo.ie
This site is much like an Irish newspaper, but with the capability within articles to simply point the mouse on certain words and phrases and have them translated without a click (one of those pop-up text boxes appears), plus there is a glossary at the end of every article.
Slán agus ádh mór,
Alan Ó hAoire