i think the SD slot on the jam has a hardware limitation so that those ideas won't happen with the current jam.
NTFS has to be licensed from microsoft i think, but if 2GB is the max size... then there really isn't any point in anything except fat32.
as far as uploading tones, i don't think there is any tone sharing for any of the spider III line (yes a spider jam is a spider III product)
having said all that... with spider 4 having some age on it now... i'd suspect that spider 5 might not be too far out... and possibly a new version of the jam...
pure speculation on my part.... but i think that a newer version is more likely than a significant firmware update for the current products... my opinion anyway.
welcome to the party!