According to today's ARG poll, PA is all tied up...
http://americanresearchgroup.com/
March 7-8: Clinton 52, Obama 41
March 26-27: Clinton 51, Obama 39
April 5-6: Clinton 45, Obama 45
Take this with a large grain of salt, but ARG has been good this cycle and their sample methods look pretty standard with low college and youth turnout, etc.