Starting off December, Nokia has announced the release of Qt 4.6. This significant Qt tool-kit update introduces support for Symbian and also adds support for Microsoft Windows 7, Apple Mac OS X 10.6, and Maemo 6. The Maemo 5 support is still being worked on. Besides Qt being available on more platforms, Qt 4.6 introduces a new animation framework, new advanced graphics effects, support for multi-touch applications and gestures-based input, major Qt performance improvements, and an updated version of Qt Creator.
The Nokia press release for Qt 4.6 can be read on the Qt web-site