Smaller businesses and people who use Hotmail as n email system or backup email system need to change their passwords - Microsoft has confirmed it's investigating a security breach.
It seems that in spite of the industrial strength security everybody of any size applies to these systems - and let's not single out Microsoft or be anti-anything here, nobody honest benefits from this sort of thing happening - reports are circulating stating that 10,000 email addresses and passwords have been taken.
You might want to change yours as a routine precaution.