Links

http://www.originsnetwork.com/ -- The Origins Network, the home of a terrific subscription service for detailed data and maps from Griffith's Valuation of Ireland and other materials (subscription).

http://www.tfhr.org/ -- Tipperary Family History Research Center, the only source of RC parish records from Tipperary, short of traveling to Ireland and looking at the parish registers yourself (research fees).

http://www.rootsweb.com/~irltip/records.htm -- County Tipperary, The IrelandGenWeb Project (free), the first place I look for anything.

http://www.buckley.org/ -- Bill Buckley's site about his American branch of the Cappawhite tree. 

http://www.ConnorsGenealogy.com -- Contains a wealth of info about family research in Ireland .....surnames, Griffith's Valuation, Tithe Applotment, references to FHL microfilm numbers etc.  There is a huge amount of content and it is constantly growing.  Be sure to check out, in particular, the section dealing with Co. Tipperary (http://www.connorsgenealogy.com/tipp/ ) and the one with Co. Limerick (http://www.connorsgenealogy.com/LIM/index.htm ).
http://www.cyndislist.com/ -- Cyndi's List has been compiling lists of genealogy sites on the web for ten years.  It is awesome. 

http://www.ireland.com/ancestor/index.htm -- Irish Ancestors, a good sources for a variety of general information, with both free and subscriber content.  I particularly like the Place Names search capability.
http://www.FamilySearch.org -- LDS site which contains, among other things, the FHL references to all the filmed records.

http://www.aon-celtic.com/  -- A site dedicated to Celtic art & illumination, which is the source of some of the graphical touches that will be added to this website from time to time, including the bar of knotwork at the bottom of teh current Home page.

[many more coming]