Banks in Cyprus payed 5% interest. Interest like that comes at a risk. You should have been aware of this.
The government of Cyprus guaranteed the deposits.
As of the latest news, they have guaranteed "insured" deposits (< 100K Euros) to prevent a pan-European bank run but those with over 100K are going to get absolutely raped. Laiki is going to be shuttered and "insured" accounts moved to Bank of Cyprus which will be allowed to survive with "haircuts".
Why there are not bank runs throughout Europe right now I have no idea...
As far as I know the US have even higher debt...