Spectec have released the World's first microSDIO WiFi 11g card which will be particularly appealing for users of new devices that feature a microSD slot as opposed to a normal SD card, but whose devices do not feature WiFi. There's a whole host of technical features on Spectec's website regarding the product itself but the key features for me are that it boasts ultra low power consumption, is Pocket PC/PDA Phone (Smartphone) compatible and is also Skype compatible.

Network Standard Support    IEEE 802.11b/g
Network Architectures    Infrastructure, Ad-Hoc
Data Rates:    < 802.11g: 6, 9, 12, 18, 24, 36, 48, 54 Mbps
< 802.11b: 1, 2, 5.5, 11 Mbps
Modulation Techniques    BPSK, QPSK, 16QAM, 64QAM, CCK, OFDM, DSSS
Receiver Sensitivity    < 802.11g: 73-91 dBm
< 802.11b: 89-97 dBm
Power Consumption    Receive: 188 mA avg
Supply Voltage    I/O: 3.0 - 3.6 VDC
Operating Temperature    0 °C to +70 °C; <95% humidity
Host Interface    SDIO Now! 1.0
OS Support    Microsoft Windows CE 4.X-5.X
Package    23.3 x 11 x 0.7 mm
   *All specifications are subject to change without prior notice.