Apple has announced a portable Wi-Fi hub called the AirPort Express that looks like the little square power adaptors that come with the PowerBook. The unit has a mini-stereo jack, a USB port, and an RJ-45 port. The unit is small enough to throw into a laptop bag for travel. In addition to serving as a regular base station, the AP Express can also serve as a Wi-Fi terminal point for attaching printers printers and as a bridge for extending the range of the wireless network in your house--just plug it into the wall. The coolest feature is that it will also attach your stereo to the network via Wi-Fi.