I've been playing with PySide and QML this week (more on that soon), but here's something that might be interesting to the Maemo community: Using the native Hildon look and feel of Maemo 5 in QML.
This QML demo uses the current theme graphics of Hildon and provides QML components that can be used just like their Hildon counterparts, but inside QML UIs. This is not a complete library, just a test of what could be possible in case anyone wants to step up and create and maintain a Hildon library of QML components. Here's a video:
The code for this demo is on Gitorious - you can try it out on your N900 using qmlviewer.