what consequences could this have to other countries in Europe? Any particular concern people should have for Greece, Portugal, etc?
The swiss did this because it was getting ridiculous how much money they were spending to maintain the peg. With draghi doing qe soon it was only going to cost more to attempt to maintain it.
The problem is that the euro banks have unknown exposure to the swiss. An event like this can cause insolvency, particularly for already troubled Greek and Portuguese banks.
I have know doubt that the ecb rides to the rescue and bails them out, but the debt weight is starting to become as unsustainable as maintaining the Eur/chf peg. Once this is realized, the moves we will see in markets will make the swiss move look like nothing...