MSN Live finally supports login from multiple devices
Skype is doing that from start. But for MSN, if you login from another device, you would be forced to logout from the first device.
Now MSN live supports login from multiple devices. This is a very nice feature as many people have PC/Laptop/Smart Phones. The chat can be seen in more than one place and thus the chatting history can be saved into multiple locations (unless you exit MSN from one of your devices)