My Hotmail account was hacked,too,last week,but i guess in my case could be different because i'm 99.9% sure to know who did it since my account on another board i've been a member more than a year ago was hacked,too,and i did not have the same hotmail address there as opossed to the same password.
Anyway,i've always considered Hotmail as a third class email
and never had any serious mail delivered there.
I did not report my hotmail hacking to MSN since i seriously doubted they would take any action more than sending a generic acknowlegdmet email back.I just opened a new account on MSN Live.