repartitioning without losing data

[Jonathan Schwarz <js speakeasy org>]

I have a need to split my /home partition (which is huge) into two 
separate partitions, a new home, and a backup partition.

Is there any way for me to do this without too much hassle/data loss?

Since I have room on /, is it possible to move home to the / partition, 
cut that partition, then move /home back? Any ideas or preferred tools 
for this?

TIA,
Jon