Negative. Wamu is still Wamu (for now). For example, HP owns Compaq, and if something’s wrong with Compaq then HP will take care of it, but a Compaq laptop sale is only for compaq lappies.
They say the transition will take about a year, but I have friends whose banks were taken over by Bank of America years ago, and they still have issues all the time. I would stick to using the Chase branches for your Chase transactions for the foreseeable future.