I find researching those in my tree from Ireland a little too much of a challenge, but here's a couple of links worth a try:
Irish Genealogy at http://www.irishgenealogy.ie/
Belfast's Clifton Street cemetery records online
For the Ulster area try the Ulster Historical Foundation site
Irish Family History Foundation Online Genealogy Databases for Ireland
The University of Glasgow Story at http://www.universitystory.gla.ac.uk/ provides access to the details of the 13,000 people who graduated from the University of Glasgow from its foundation in 1451 until 1896.
Ireland's 1911 census website. Returns for Cork, Donegal, Wexford, King's County and Galway can now be searched at http://www.census.nationalarchives.ie/search/
Things should improve for Irish genelaogy in 2011 when the Northern Ireland BDM records go online at the General Register Office for Northern Ireland