Here's the current state of PyQt:

It is ATM being built against 4.5 to be able to reach Extras proper. As Maemo-specific stuff was integrated in the development branch of PyQt, I was waiting for upstream PyQt to release a stable build with all the necessary changes. The good news is that this happened a few days ago, so this weekend I'm going to make a PR1.1 compatible 4.5 release that is going to -testing (and 10 days later to Extras). I think this is very important as it will, for the first time in Maemo history, allow Qt-based python applications to reach mainstream users. Even if you plan on using PySide after PR1.2, this is a good, compact and stable starting point.

After this release is made, I will recompile with 4.6 support (it supports all the stuff mainline 4.6 brings, so animation framework/etc is in there) and upload that version to extras-devel. That release will follow further Qt 4.6 releases. The support for Maemo 5 specific classes will depend on request demand - as there are not so many of them, it's not THAT big of an issue to add them.

EDIT: To avoid misunderstandings - the version of PyQt in extras-devel supported Qt 4.6 from around mid-december, but you needed to recompile to 'unlock' the 4.6 functionality. With this release, you will get BOTH a proper 4.5 and a 4.6 package, that will be able to coexist on your device, just like Qt 4.5 and Qt 4.6 currently do.