I don't imagine, just yet, any SDIO wifi card works... AFAIK no sdio cards work at all.. but are rumoured to be coming soon to a kernel near you.
I did try an SDIO bluetooth card, a Toshiba (see my post) which was detected in Cacko1.23 on C3100, but I couldn't actually do anything with it, even though it appeared the kernel was trying to use some sort of serial driver. bummer.
