Quote from obarthelemy on August 26, 2011, 17:50
Your own wiki says the SD slot does SDIO.
If you're clever enough, you should be able to boot it with the root system on a USB stick and then unmount the SD card, remove it and connect an SDIO card. Which is to say, it's wired up that way, but it's not a supported feature!
I should point out that the Wiki is a community resource, created by the community, not us, by the way; and that the word "provisional" appears in big shiny letters on that page.