So last night I decided to take the plunge and both update my N800 internal flash to the current rev, and set it up for booting from mmc at the same time. I believe I've got it working fine, but I have two questions in regards to maintaining a solid system...

1. I have read (notably here) that one caveat of booting off mmc is the propensity for the card to be get corrupted, and that a "fsck -fy /dev/mmcblk0p2" needs to be run every now and again. If that is the case, is it a bad idea to simply run this command on every boot, especially since I hardly ever turn off/reboot the device? Will it be painfully slow? If it's not a bad idea, is there a boot script that would be an ideal place to run the command?

2. One of my intentions for booting off mmc is to maintain a baseline system on my powerbook so I can simply replace the necessary file structure if things go bad. Is there an ideal system to for doing this? Can I simply make a .dmg of the FAT partition, drag and drop the entire directory tree, and keep it safe? Or should I use a tar command to preserve it? Am I even correct in assuming that saving the contents of the FAT partition will enable me to get back to a default state quickly? I believe I read that as one of the benefits somewhere.

I'm not a Linux n00b, but I'm also not an everyday user, so please be gentle.