The Central Bank have released a new paper by Yvonne McCarthy and Kieran McQuinn (link here) that uses data from the 2007 Survey of Income and Living Conditions (SILC) to describe how various types of households were coping with their mortgage burdens on the eve of the economic crisis. The paper also applies various techniques to estimate how these burdens may have changed since 2007.
I think this type of work is vital for gaining a better understanding of the extent of the upcoming mortgage default problem. It would also be crucial that data of this type be utilised if the government do wish to design a mortgage modification program, as discussed earlier here and here.