Mirror neurons and positive psychology

Today's Wall Street Journal has a Science Journal column by Rober Lee Hotz reporting on new discoveries about mirror neurons -- the brain structures that appear to enable empathy.  Experiments at UCLA on exposed brain tissue of patients undergoing neurosurgery have, for the first time, identified the individual mirror neurons in humans.

The link between psychological experiences such  as empathy and brain structures is fascinating.  Of course, I am interested in the links to positive psychology.  For example, here's the next to the last paragraph of the column:

These mirrors also are attuned to cultural experience and ethnic identity, Dr. Iacoboni and Dr. Molnar-Szakacs reported in the journal PloS One last month. (Read the journal article.) They determined that this involuntary sense of empathy responds differently depending on whether we are looking at someone who shares our culture or someone who doesn't.

But we also know from Barbara Fredrickson's work that individuals in a positive emotional state lose the "own-race bias" in recognizing faces.  So, what's the connection between the activity in neural structures involved in positive emotion and the mirror neurons?  Can understanding of patterns of such activity help us better learn how to promote well-being?  No answers here, but I'm certainly looking forward to learning more as new research is done!