Introduce a blog “The Geometry of Bending”
You can read some interesting articles dealing with advanced deformation in Rhinoceros, including Grasshopper.
[via]creativetools
Woo Jae has been kind enough to share his expertise. Now you can download a grasshopper tutorial describing how to build up a structure in a parametric way.
[VIA]Creativetools
A video lesson from Rhino3D.TV give an insight into how to create a hair dryer where form is powered by a feature in Grasshopper module. Read more.
I try to watch through the former link but in vain. Log into Rhino3D.tv, you can download the zip file and watch the tutorial under the Grasshopper Categories. It’s Ok.
[via]creativetools.se
Thx Google. I find it. 
Sanghoon Yoon is a designer in Seoul. He has been kind enough to share many script and expertise on his blog sac3′s digital plastic.
You may be interested in  some of the topic.
* GrasshooperÂ
* RhinoScript
*Â HyperShot
* Other
Grasshopper 0.5.0050 is now available for download from:
http://download.rhino3d.com/download_rel.asp?rel=400
This is quite a major new release (it’s been 3 months after all) which undoubtedly has many fresh bugs.