Originally Posted by dynomot
While a Nandroid back up with a rooted phone will take a "snap shot" of it at that time I would be rather wary of restoring a Nandriod to a different phone to the one it was made on (That one would have to be rooted as well). Nandroids can be pretty temperamental things; for instance never change their folder title it borks the Md5 checksum rendering them useless.
I've heard people say that, but I always rename them and never have that problem. Maybe it depends on what recovery you have, machine you use, or how you rename them (as an long time Unix and Linux user I never put spaces in file names, for example)?