It was announced a while ago, but this morning MSN Messenger announced it to me personally (well it game me a popup)… MSN Messenger and Yahoo! Messenger users can now chat to each other using either’s client.
This is presumably a way to try and stop the multi-network clients that are becoming more popular and taking advertising revenue from the two of them. Well sort of. It’s more likely an attempt to stop Google’s attempt to spread a free and open IM network.