US based NRI from Feb

#1
I did Search by "NRI" but did not find the answer. Please help with below.
I heard that starting Feb 2011 some law is changed which allows US based NRI to trade in Indian stock market. However, one big broker told me that they do not serve US based NRI. May be other brokers do.
Which one is true? How can US based NRI can trade. It doenot have to be on-line. via broker is okay.