When MS have stopped foreign clients to get to it’s messenging service that was a classic MS action to obtain more money, Yahoo is an excellent follower of the that transaction. While many IM clients supports Yahoo messenger protocol, Yahoo now blocks the access to the non-yahoo clients , certainly beacuse they are fats and don’t have banner of nagging screen of the kind “Buy me , kick me , yahoo me”. As a Yahoo non user from native reasons. I would like peapole if they stop making stupid use of MSN and Yahoo , other protocols are 100 % free as Jabber with some hundreds of clients and server !!