Update:
Upstream released PyQt 4.7.2 which (bolstered with a few patches from yours truly) fully supports Qt4.6 for Maemo.

I will open a new topic for that release, this one will remain open for Qt4.5 related issues (since Qt4.5 will still be supported for N8x0 devices and pre-PR1.2 N900s)

However, due to a few changes PR1.2 will bring, I need a few volunteers. PR1.2 will leave out a few modules to conserve space and this means the Examples package (python2.5-qt4-doc) needs a bit of love before it can be released for PR1.2. Long story short, help is welcome to rid the demo application of any QtHelp, QtAssistant or QtDesigner dependencies (as said above, they will not be in PR1.2), and is an excellent way to brush up on your Python-Qt skills.