There is some talk from PA state legislators about repealing the PA inheritance tax.  See Neil Hendershot's blog post here.

ACTEC (American College of Trust and Estate Counsel) maintains a chart showing the death taxes in all 50 states:  2009 State Death Tax Chart.  States with death taxes are in the minority, but not overwhelmingly so.  It seems a very remote possibility that the PA Legislature would do away with this source of tax revenue in the current economic climate.