Topics For Guest Lecture For MBA-HR

I have got a good number of years of working experience in HR domain. I am getting lot of offers for Guest Lectures from various MBA Institutes.
I would like to know, which are the topics which could be of relevance for students of MBA-HR as Guest Lecture.

A few topics I would like to suggest are:
a) Changing role of HR.
b) Challenges of HR in the 21st Century.
c) Leadership for the new millennium.
d) Role of HR in organization building.
e) Strategic roles of HR.
f) Exciting challenges and opportunities in HR.
Also, you may check with the colleges concerned on topics of interest to them.
R Sundararajan