Something

import Blender
from Blender import *

#global Variables
#traced_object = 'Suzanne'

#create new curve + data
scene = Scene.getCurrent()
trace_curve = Curve.New()
curve_obj = Object.New('Curve','tracer_curve')
curve_obj.link(trace_curve)
scene.link(curve_obj)
trace_curve_data = Curve.Get(curve_obj.name)<----NameError: Curve "tracer_curve" not found

#get mesh data
traced_object = object.getSelected()
traced_mesh = Mesh.New()
traced_mesh.getFromObject(traced_object.name)

print traced_object
print traced_mesh
print trace_curve

#for traV in traced_mesh.verts:
	#trace_curve.CurNurb.append(traV.co[0],traV.co[1],trav.co[2],0.0);