I enjoy Jon Kabat-Zinn and his talks, books, practices. “Wherever You Go, There You Are” is a great book as are his CD programs on Mindfulness. He has done plenty of research that shows the affects of a mindful meditation practice on the the brain.
Here is a talk he gave at Google with a short mediation sequence and Q&A. It is something that I got more out of each time I watched and listened. Enjoy.
http://www.youtube.com/watch?v=3nwwKbM_vJc