I had just gotten my 800, and went to the how-to extend filesystem to MMC card by Wolfram, when at the top of the page, I saw a link on booting from MMC. So I bit, and everything went fine. THEN I realize that there is an update for the firmware. I go through with it and update that too...and without missing a beat, I did the whole boot from MMC process again...but I didn't format my card.

After I upgraded and did the boot from MMC, I booted from MMC...only to find that everything...programs, most of my settings, etc...were still in tact. I just restored my backup I made prior to the flashing, and boom. Everything is back to normal. I don't know if anyone knew of this or not...

Oh, and the firmware version when I boot from MMC is ...the latest version. 2007 something.