Wow .. missed this one... MS and Yahoo build a bridge between their IM clients
Edit: Be careful with this one; I'm hearing reports of users losing their contact lists, and problems when logging in. Export your contacts before trying out this product.
That's right - beta "interoperability" software has been released that allows the MSN and Yahoo IM clients to talk to each other without the use of third party products such as Trillian... very cool.
http://ideas.live.com/
http://messenger.yahoo.com/
The beta program will be available in Argentina, Australia, Brazil, Canada, China, France, Germany, Hong Kong, India, Italy, Korea, Mexico, Netherlands, Singapore, Spain, Taiwan, Turkey, the United Kingdom and the United States.