RegHardware: "Creative's X-Fi sound cards have been around for a while, but with the Sound Blaster X-Fi Notebook we have the first ExpressCard 34 iteration of the breed.
That's not to say laptops with ExpressCard 54 slots have been ignored - the Sound Blaster comes with a suitable adaptor. Whichever of these slots you use, the card's all about bringing high-quality multi-channel audio to laptops. It also doubles up as a wireless music streamer, though only to Creative's new Wireless Receiver. But more about that later."