I found this site while following links, and it's one of the best resources for property markets I've seen around.
They give detailed information on just about everywhere, plus analysis of returns etc.
They show which regions are cheap (ie Germany etc), and which ones to avoid like the plague (Ireland, Spain, UK, USA)
I don't know how they make money, but the writers seem very well aware of the underlying economics of property.
http://www.globalpropertyguide.com/
