import Blender, bpy;
from Blender import Ipo;
for x in bpy.data.ipos:
for y in x.curves:
for z in y.bezierPoints:
z.pt = [z.pt[0]*3,z.pt[1]];
y.recalc();
If you're very clever you can find the value 3 and change it...but only if you're really clever ok?. I'll try and add a ui to it sometime!
*Your computer may be repossessed if you run this script or other scripts provided by me