Apparently Kotaku has multiple sources claiming some interesting Cafe tidbits. According to the sources, Cafe will only carry 8 GB of flash memory, with SD support. They are also claiming the disk size will be a around 25 GB, which is the size of a single layer blue-ray disk. The sources do not mention anything about Cafe capability to play blue ray movies or if the disk is actually blue ray

I see Nintendo supporting the idea of SD card use. I can see Nintendo thinking; why use up space an money on a hard drive when SD cards keep getting cheaper and faster? I do not know enough about the speeds of SD cards and hard drives to say which way is better.

Editor notes:

What I am about to say is not a rumor, just something I am thinking. If Nintendo is planning on supporting SD cards for the Cafe, and the rumors about streaming to the controller are true, could Nintendo’s plan be to put the SD card into the controller as well? To me that will make the controller the ultimate portable gaming device. When you take your controller to your friends house you will have all your saved stuff with you. Just something to think about.