via Lisa. I was surprised to learn that yahoo is blocking trillian.

Beginning at about 6 p.m. Wednesday, Yahoo changed its instant messaging language to prevent third-party services, such as Trillian, from accessing its service. Like previous statements, the company said the block is meant as a pre-emptive measure against spammers from its Yahoo Messenger service.

Trillian is a great product for instant messaging, if your friends all use different im services.