Remember the Irish property bubble bust around 2007. Prices have come down a bit since then (current stats have houses worth half what they used to be). Rent has decreased a little, but not that much.
On the other hand, a financial crisis probably won't make for a more enjoyable cityscape. But given that I was there 2003, the property bubble might have improved the architecture of the city a bit before it burst…
Total cost of living was pretty high, and I'm coming from one of the more expensive regions in Europe. I'll definitely have to visit again. A callcenter job and depressed Scandinavian roomates probably colored my impressions a bit…