More details from the convention website:
“The theme of Tuesday night’s program is Renewing America’s Promise, and there is no more critical promise that we can keep to American women than to ensure pay equity,” said Speaker Nancy Pelosi, Permanent Chair of the 2008 Convention. “There is a clear difference between the parties when it comes to pay equity, and this election could not be more critical when it comes to garnering support for reversing the Supreme Court’s recent 5-4 decision in the Ledbetter v. Goodyear case. As American women are called upon to do more and more for their families with less and less resources coming in, the least we can do is to ensure pay equity.”
Apparently she'll be speaking at around 8pm Central time.