The Linux kernel is finally getting real support for SD cards.
http://kerneltrap.org/Linux/MMC_Flash_Memory_Card_Support

Pierre went on to discuss the Serial Peripheral Interface (SPI) stack, "the second large feature is the fact that you can now use your SPI controllers for MMC, SD and SDIO. Yes, even SDIO works nicely over SPI. This means that a lot more systems can get storage and expansion I/O at basically the cost of a connector."

This is good for Digispeaker since we have an SD Card hooked up with SPI. Now we have a device driver for it!