Sonnet Technologies today announced the Aria Extreme, a CardBus adapter that provides 802.11g wireless networking for certain PowerBook G4 and G3 models. It is compatible with Apple’s Airport Extreme Base Station as well as other 802.11g hubs. The Aria Extreme is also backwards-compatible with previous 802.11b Wi-Fi network devices, and supports both 64-bit and 128-bit Wired Equivalent Privacy (WEP) encryption. It is priced at US$79.95 and will be available later this month.