Filesystems for flash

jffs2

• the standard fs
• slow mount time and high RAM usage for big cards (grows linearly with flash size, since it reads block by block through the flash)
• design summary at http://sourceware.org/jffs2/jffs2.pdf
• compression (gzip) available "on the fly"

yaffs2

• good summary with basic problem description at http://www.aleph1.co.uk/book/print/77
• more scalable (but not part of linux vanilla kernel)

LogFS

• relatively new (and buggy)
• project page is here afaikt: http://logfs.org/logfs/
• description with flash basics at http://wh.fh-wedel.de/~joern/logfs.pdf
• attempts to reduce the shortcomings of jffs2