What is the AMR slot?

Misha asks: "I just started catching up on hardware info, and it seems many new chipsets (Apollo KX133, etc.) and motherboards are supporting this new type of slot. Seems to be a substitute for ISA if you are using it with a sound card or a modem. Not sure what the advantage is, but I assume it has something to do with letting ISA go. Can enlighten me some more about it?"