Two final polls out in Pennsylvania, each showing an opposite trend. First, Zogby's final tracking poll (April 20-21) has Clinton expanding her lead to 10 points from six points:

Clinton 51 (+3 vs. previous day tracking poll)
Obama 41 (-1)
Undecided 6

On the other hand, Insider Advantage's final poll (April 21)has Obama picking up three points while Clinton is flat:

Clinton 49 (nc vs. last poll April 20)
Obama 42 (+3)
Undecided 9

Overall, Clinton's lead in the RCP Average for Pennsylvania is at 6.0%.