During the process of my last semester’s work, I just had to offset hundred of thousand curves, which seemed like to take forever.
So, this Rhino script is for this offset operations. Run script at Monkey, select curves to offset and then just wait Rhino to respond. Then you will get offset curves on the new layer.
Some screenshots of Rhino. Original curves,

original curves
and offset curves,

offset curves
and offset script.

offset script
And for those of you interested in script, download script.
