One feature I think I'll like:
quote:
Originally posted by http://windowslivepreview.com/messenger/new
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Availability by category
Once you have those categories, it’s easy to choose your presence availability by category so you can be offline to one set of friends while you’re online to another — letting you decide who can reach you in real time.
quote:
Originally posted by http://windowslivepreview.com/messenger/new
Synchronized status updates
When you post an update, you can have Messenger automatically synchronize that update with your other networks and vice versa.
Although the interface is not exactly Picasso, I think the feature set has been improved.