I wrote a Qt Creator plugin a while ago that does code completion, tooltips, navigation, etc. for Python source code. I never did anything specifically for PySide but it might be fun to try: https://github.com/davidsansome/pyqtc
I wrote Noogle Goatbook (http://www.nooglegoatbook.com/) 2 years ago when they first announced Google Notebook was being discontinued. It's still a little rough but I might continue working on it and/or stick it on github if people are interested.