My laptop (Samsung P35) has an internal card reader (SD and MemoryStick) done by Ricoh. Several other laptops have this device. It's internally connected as a pcmcia-device and shows up as RICOH Bay1Controller on pccardctl ident.

For years now there was no way to get this thing running in linux, which stopped me from doing projects like having a crypto-key on a small SD-Card and insert that on boot. Now, finally someone did the job and reverse engineered the device: sdricohcs

In my first small tests, I could already download some photos from my digital camera card. No problems so far. Now, the only thing I'm really missing with linux on my laptop left is TV-Out (works with ati binary drivers, but they are unstable like hell). I heared some Xorg-devs are already working on it, so maybe I'll soon announce the »nearby 100%« support for Linux on Samsung P30/P35.