The advice has to be that if you use an online bank do the following:
1) Never follow a link from an email - always type it into the address bar.
2) Know how the security of your bank works. If they normally only ask for 3 letters from a 'security code' never give more than 3.
3) If anything changes check with the bank using a previously verified email address/telephone/in person.
4) You will never be asked to verify security details so the bank can 'update' their records. Never disclose any of your details to anyone else - in the same way you wouldn't your PIN.
Follow these simple tips and you will be safe. That is until someone works out how to hack the DNS record and direct real domains elsewhere...!