Radio resource in various languages
Recently I stumbled upon this wonderful resource: http://tunein.com/ You can find all types of national radios there by simply inserting the name of the country or language you are interested in. I've spend entire week switching between Italian, Swedish and Greek. Really love it! Hope it will be useful for others as well, even if you simply are curious how a language sounds (my case with Swedish). Have fun!
OTR excellent for old radio programs in various languages
For Irish, Radió na Gaeltachta is a great station. It's run by RTÉ the national broadcaster. It tends to have a mix of talk shows, news and music and can be streamed on the RnG website.