Just a little FYI, you may all know this but I sure didn't. After you get done doing a nandroid backup, and you go in with an application like Astro, make sure there aren't any spaces in the folder name. Nandroid does not like that. Took a backup, tried a different ROM, didn't like it so went to go and restore my backup, wouldn't restore. It wouldn't get by the MD5 sum check. I just happened to notice there was a space in the name, mounted the memory card, removed the space, rebooted back into recovery and attempted to to the restore again, and success. Just a little tidbit of information I ran into first hand.