One other thing I would add to this is that I believe there are legal problems if they were to revoke a job offer in a situation like this (what I heard - IANAL

One other thing I would add to this is that I believe there are legal problems if they were to revoke a job offer in a situation like this (what I heard - IANAL). Keep in mind that an obligation to still hire you may mean you're walking into a situation where they no longer wanted to hire you. In my case, people I went to for advice kept pointing out that if the company was making such a drastic cut of their engineering staff, they shouldn't have been hiring less-experienced employees anyway. That doesn't seem to be the case in Microsoft's specific situation with Nokia, though.