Jason Levine rebuts the now widely distributed Joel Spolsky article on Microsoft Passport. He’s right to point out that many sites are putting all of their subsites in one network in order to share cookies between them, but misses the point that Microsoft is trying to get third parties to join the Microsoft Passport network as well. Passport isn’t just an MSN phenomenon, it’s used at all of these sites as well. Perhaps this is discussed in the responses to Jason’s article, I don’t know because I haven’t read them yet.