Can anyone please post some iPhone related OpenGL tutorials.
Thanks in advance.
No.
Because Apple force you to sign NDA to do things on the iphone.
AFAIK the NDA has been lifted for all released versions of iPhone OS. The NDA only applies to unreleased versions.
Reference:
http://www.red-sweater.com/blog/614/apple-lifts-iphone-developer-nda
here is one active forum discussing iPhone development: