According to a tip sent to Brighthand, palmOne is preparing to release a Wi-Fi SD card for the Tungsten T3 and Zire 72. This will be the first SD card of this type for any palmOne model. palmOne's latest sales guide for spring 2004 includes an accessories chart that shows this wireless networking card.
Unfortunately, there aren't many details available. The price isn't given, nor is there a release date. The guide does indicate that this WLAN card will not work with all current palmOne handhelds, only the Tungsten T3 and Zire 72.