Yup, but without multiple logins, you'll never know where you have them. Then someone will be talking to you on the phone in the bedroom, but you're sitting at the computer in the living room, so you don't see the conversation until hours later. The next day someone tries to reach you at the computer in the living room, but you're at the office so you don't see it until hours later. Another day someone talks to you at the office computer, but you're on a business trip to another city, so you won't see it until the next day.

I don't want to have to choose machine all the time. All machines should always be online, so people can reach me wherever I am. Since multiple logins don't work, I've stopped using MSN on computers and only use it on my phone. That means less connection stability, less features, lousy keyboard and a bunch of other drawbacks compared to the computers, and I still miss conversations when the phone is left in some other room, but at least I'm not bouncing back and forth as the MSN clients compete for the only connection.