I haven't checked there in some time, so I can't tell if someone's already asked, but I suggest having a look at the Thaumcraft forum thread on the official MC forums. As far as I know, if there's a chance of Azanor seeing such a suggestion, it'd be there.
I have managed to move one. its just just moving regular nodes, but really difficult. You have to get the jar structure up faster than the node can devour the blocks. It took me probably 10 minutes to do and used probably a stack of glass cause they kept being eaten, but it is possable. I havent taken it out of the jar, and probably never will. Its my trophy now.
Worth knowing.
Question: once the jar was complete (but you hadn't picked it up yet), did the Node keep eating the blocks? Or was its effect sort of "stopped"?
no the effect dosen't stop when you have the jar compleat, you have to click it whith your wand.