Did your Irish ancestors settle (even temporarily) in Quebec? 

If so, you will be interested to learn MyHeritage has acquired MesAieux.com, a family history service specializing in French Canadian genealogy. Here's a tidbit about them from the MyHeritage press release:

MesAieux.com (also known as YourFolks.com in English) is a Quebec-based family business founded 20 years ago to make genealogy simple and reliable. Its initial mission was to build a reliable database with exclusive services to help people with ancestors from Quebec find them rapidly. MesAieux.com is a leader in Canadian genealogy, serving more than 1,000,000 members...Its database covers Quebec as well as other places where French-Canadians have migrated and includes Canadian birth, marriage and death records, as well as obituaries and censuses...

Read more about MesAieux,com at the MyHeritage blog.