On the 17th of June, 2009, the Central Statistics Office, Ireland’s public statistics body, saw sense and published the results from every census undertaken here since 1926 on its website, cso.ie. Until very recently, these data were only available to certain people, for certain reasons, and most probably, for a certain amount of money.

83 years' worth of census statistics has been made available to the public.
When I read this article from The Irish Times, I was quite excited at first, the headline bringing connotations of searchable databases, XML files and stylesheets with rounded corners and what have you:
Census data since 1926 available to all and just a few keystrokes away
But, sadly (this being Ireland after all), all the CSO has done is to scan the documents, shovel them into massive PDFs, and hide them away on the site, masked behind a horrific web-interface. I understand that text-mining (especially when OCR is involved) is tricky at the best of times, but surely just a little bit of effort could have been made.
Oh wait. No. Fianna Fáil spent all our money. We can’t afford effort like text-mining.
In any case, I’m sure their publication will prove invaluable to researchers. Have look anyway, if you can brave FrontPage-style websites. Hopefully when (if) the recession ends we’ll be able to pay the nice computer scientists to really digitize this stuff.