Shoutbox

I really don't expect this to go ahead...a while ago AOL and MSN had almost the same talks, and nothing came of it.

I'm not really in total favour of this (if it goes ahead), every time a new upgrade comes out for either Yahoo or MSN Messenger, they'll have to consider whether this will be worth spending time on if the other client will get baffled with the new information.
Each side will always be trying to make it friendly for the other client, which will limit feature development. Not to mention the legal extra proceedings that will have to go ahead for each new build.