Creative just intro'd a new external dolby digital live encoder. Called DTS-610, this takes 6channel input from any pc soundcard and converts it to AC3 in real time. Stupid if u ask me cos AC3 is lossy and it involves Digital->Analog->Digital->Analog conversion which would definitely lead to loss in fidelity. Still its better than nothing for audigy 2 zs users. However most ppl are still better off with a real DDL Live card like the HDA X-Mystique.
http://soundblaster.com/products/hometheaterconnect/
http://soundblaster.com/products/hometheaterconnect/