I've been waiting for this one for a while - Sandisk + WiFi. An 802.11b WiFi card, packed into an Secure Digital (SD) card with 256 MB to boot. How much, a measely $106.49. Nice. Socket Com also have a similar item - the SDIO WLAN CARDSDIO 802.11B. Amazon list's it for a whopping $1,893.99, though I think this might be for 20.
What I want to know is what software needs to be run on the primary processor in order to get this to work. Is everything mostly on the card already? Or is it relying on the local microprocessor to do the work. If the former, this could be a cheaper way of enabling devices to have WiFi - at least for a hobbyist. We could use embedded Linux. Are there Linux drivers for SDIO 802.11b? Discussion here. The answer, at the moment, appears to be no. A link was made to a Fujitsu document, but this seems to have been removed.
The SDCA is a huge believer in "security through obscurity". Sharp went as far as to offer closed-source drivers for SD memory cards, but I doubt we'll be seeing any SDIO drivers for Linux until the Bulgarian high school students break the security and spread the secrets all over the net.Go Bulgaria!