As I understand it,there are too many properties being built in Spain,Cyprus and Bulgaria at the moment and not enough people who want to buy them,or who want to go there on holiday. So as an investment they are probably not going to be that great,at least not in the short to medium term.
In my opinion whenever something is the latest 'big thing',whether it's overseas property or shares,it usually means that the average bloke has missed the boat and investing now would mean you are more likely to lose money than make it.
In the late 90's there was a big rush to invest in technology shares and a lot of people made some serious money. But had you invested at the height of the market,when the financial press were pushing it, you would have lost most of your money.
So in general I would say if you want to make money from property abroad,you need to go out and find the next boom place before the masses do and in the meantime don't believe the hype.