In the Windows XP User Account settings it still talks about .NET passport settings, no doubt MS will make a patch or some kind of upgrade out shortly that renames it.
MSN Messenger's sign in screen also still has .NET passport listed.
Very few sites actually used .NET passports to sign in that aren't owned by Microsoft anyways, so it is a logical business move.
Also if it's just going to be on purely MS sites from now on, there's no chance of anyone faking a login screen to get passport account details without it looking obviously fake.
Good move for Microsoft