What is Jamie McMurray Doing in a Hendrick Car?

One has to suppose that gluttonous multi-team millionaire owner Rick Hendrick is trying to figure out if Earnhardt-Ganassi Racing has any info he needs, since Jamie McMurray has accepted a Nationwide Series ride in the JR Motorsports (run by Rick Hendrick) car. What are Chip Ganassi and Teresa Earnhardt thinking??? It's highly suspect to have one of their Cup drivers desert their organization to take a Nationwide ride for Dale Junior's team. After all, there obviously isn't much love lost between the parties involved....Inquiring minds wonder what's going on.....