Nokia is streamlining development platform to Qt. Since the past few weeks, a number of new Qt tools has been made available. Forum Nokia blogs has a full story on this. 

As for developer, what are the new stuff? First, we have the Nokia Qt 4.7 for Symbian 3 Developer Version , a package based on Qt 4.7 where QtQuick
is the key feature. As additional bonus, the package contains the
QtOpenGL module, offering an OpenGL ES based graphics system for
Symbian. This package contains a IDE similar to Qt and can be run on its own.

Since yesterday, a new Nokia Qt SDK is downloadable at http://www.forum.nokia.com/info/sw.nokia.com/id/e920da1a-5b18-42df-82c3-907413e525fb/Nokia_Qt_SDK.html.

This new Qt SDK V1.0.2 adds preliminary support for Qt 4.7.  Another good point is that Windows 7 64 bit is supported. Previously i have to run my Qt on a windows xp virtual pc