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I can confirm that Margaret Ryan (ca. 1838-1937), wife of Cornelius Harrington, was the daughter of Michael Ryan and Bridget Lahey of Curraghafoil, Doon, Co. Limerick (though Michael Ryan was apparently born on the Tipperary side of the border).

Margaret's sister Honora Ryan (my 2x-great-grandmother) was also married at St. John the Evangelist, Gananoque, Leeds Co., Ontario, Canada, to a Thomas Benton of Cappawhite, Tipperary.

I believe both Cornelius Harrington and Thomas Benton were amongst the Irish labourers working on the construction of a Grand Trunk Railway line from Montreal to Brockville, which opened in 1859. They did not settle permanently in Ganonoque; and by the early 1860s had moved on (Thomas Benton and Honora Ryan to Pakenham, Lanark Co., Ontario; Cornelius Harrington and Margaret Ryan to Renfrew Co., Ontario).

I have a bit of information on the family here:

http://www.familytree.ottawavalleyirish.com/familygroup.php?familyID=F13&tree=Moran

Who (or what body) owns and operates the Irish Family History Foundation, and where does it get its funding? 

In its "History of the Irish Family History Foundation" ("About Us" page at the IFHF site), the IFHF is quite upfront about its goal of marketing genealogy as a "tourism product".  Is this an entirely commercial, private sector operation? or is it associated/affiliated with the Irish government's Department of Art, Sports and Tourism? 

In any case, I think the fees for its online research system are exorbitant.  10 euro to view a record, which may or may not be relevant to one's search, but you can't really know until you've paid to view it, because they don't supply enough information (e.g., name of parents in the case of a baptism, name of spouse in the case of a marriage) before you pay up.  Is this a for-profit operation? or do they have to charge these fees just to run the system because the operation is underfunded? 

For early Irish emigration to Upper or Lower Canada, it's worth checking the McCabe List.  This is an 1829 petition to the Crown, signed by about 700 Irishmen, many of them canal labourers, in the Bytown [now Ottawa] area, asking for relief for their relations back in Ireland.  Basically, they wanted the government to help pay the passage of their relatives to Canada and give them some land.  Many of the petitioners named their parishes and counties of origin.  They also tended to name a local magistrate or clergyman back home who could vouch for them (note: in some cases the petitioner is RC, but names a Protestant clergyman as reference).

So I just checked it for you, and there are several McGuires on this petition:

Francis McGuire (McCabe List #587), signed (or rather, marked with his X), and said he was from Nockbride in Cavan, and reported: "Has an uncle, James McGuire, with a family residing at Nock bridge in the Co. of Cavan, for whom he is desirous of obtaining land." 

John McGuire (McCabe List #360) signed (marked with X) and said he was from Nockbride in Cavan. "has a cousin Phillip Cusick, with his family reside at Baly Burn in Parish of Nockbride and is known to the Revd Mr Baily of Said place." 

Peter McGuire (McCabe List #222) signed, and said he was Mountbride in Cavan.  "This applicant's father, Dennis McGuire, with a large family reside in Mountbride in the County Cavan he is known to the Revd Samuel Adams."

There is also a John McGuire from Kildare (ML#389) and a James McGuire from Donegal (ML#640). 

For early Irish emigration to Ontario/Quebec, you should also check Al Lewis's Bytown or Bust site.  Many Irish originally went to Bytown, before moving on to help settle other parts of Canada (and the US). 

My gr-gr-grandmother Bridget Gallaghan/Galligan (daughter of Patrick Gallaghan and Mary Quinlan) was born in the parish of Kilmore, Co. Cavan in 1835.  Emigrated to Canada (with parents and numerous siblings) circa 1846-7.  That's not much of a lead, I guess, but you might want to check Kilmore?