National Archives - 1911 Census
If anyone is interested in tracing their family history the National Archives of Ireland in association with Library and Archives Canada have digitaized the census returns for 1911.
http://www.census.nationalarchives.ie/search/
Unfortunately it only lists the Dublin county returns for the moment but will gradually include all counties.
All you need is the full name of a relative who lived in 1911 and their approximate age and possibly a rough idea of the area they resided in (to verify you have the correct person).
An excellent resource,I found my great-grandparents records quite easily.