I logged onto msn today and all of my contacts are gone!!!!????

Try uninstalling and reinstalling MSN messenger

if none of the above work, go to the options tab (where you change your screen name) select the privacy tab and check all the blocked contacts. if the proper contacts are there, just select them and allow them again and all should be good. Hope everything works out though, i've had this done before and it sucks. Good Luck!!!!

I'm sorry to hear this. I'd suggest that you maybe try and wait a while to see if there was something wrong. If not, it could be possible that someone else had your password and deleted them off your list. If that's the case, and you told someone your password, I'd suggest not doing that. Also, you may want to check that your contacts list isn't set to where all off the contacts are hidden.