News via apple.com :

Now featuring support for the faster 802.11n Wi-Fi specification, the new AirPort Express Base Station delivers up to five times the performance and twice the range of the previous model. The worlds smallest 802.11n-based mobile base station, the new AirPort Express offers a great option for anyone who wants to set up a high-speed wireless network, share a printer wirelessly, or stream iTunes music wirelessly from a Mac or PC with AirTunes. And because its so compact, you can take AirPort Express with you and set up an ad hoc wireless network in your hotel room. Available immediately for Mac and Windows, AirPort Express sells for just $99.00.

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again with no usb hdd support...