MyHome.ie is a nicely designed Google Maps mashup to display property for sale in Ireland.
You can search the map for property by location, price, type of property and by the number of bedrooms. The returned results are then displayed on the map. If you click on a property's map marker you can view a photo and a brief description. The information window also contains a link to view the full details of the property.
MyHome.ie also allows you to search for rental and commercial property in Ireland. There is even a function to view overseas property, which shows properties on the market mainly in the south of France and northern Spain.