Haven't done it, but have thought about it many times. A couple years ago I came across a slick pamphlet that discussed buying property overseas. I think it was produced in Ireland, but I can't find it to verify. Regardless, I remember some of the cautions. First and foremost, hire an attorney (in the country where you are buying). Realtors and title agents do not perform the same duties that they do here, or have the same legal obligations. Also, do your own due diligence, which will mean spending time locally to dig into the background and status of your potential purchase. Also, in Ireland, be aware that they have a stamp tax on home purchases, which can run as high as 9% of the purchase price.
Be sure to check out each country's rules regarding length of stay for non-citizens (if you are a non-citizen of that country). Ireland, like other Schengen countries, ordinarily limits you to 90 days out of any 180 day period.
Good luck! It can be an involved process, but one that might be well worth it.
FOUND IT! The "slick pamphlet" is called "Buying Overseas Property Safely" and is published by the Association of International Property Professionals. Website is www.aipp.ie. A good intro to the dos and donts of buying such property.