Yeah after I posted that I noticed that the FAT partition was empty. Incidentally, I created a disk image in OSX Disk Utility of the entire mmc. It recognized all the partitions and their formats...even though it couldn't mount the ext2 ones. My original intention was just to be able to burn the image back on the mmc in case of a catastrophic error, but I have a feeling that this simply won't work. Right? (I told you I was new at this!)

User schmots wrote in his blog (http://schmots.blogspot.com/) that running "fsck -fy" on mmcblk0p2 after booting from internal flash would clear up corruption issues. The post itself was informative to me. Is his advice atually incorrect? If so, someone should tell him.

I'll look for mkfs.jffs2 and sumtool asap! I just needed a push in the right direction. Thanks...