Qt 4.8.0 RC1 is now available for download as an online update via the Qt SDK. It also includes the QtWebKit 2.2.0, see http://labs.qt.nokia.com/2011/09/29/qtwebkit-2-2-0-is-released/ for more details.
This release candidate has the quality stabilised code targeted to be the basis for the final Qt 4.8.0.
For those using the public git repository, a “v4.8.0-rc1″ tag will appear soon.
If you would like to provide feedback, you can do so using the Qt Bug Tracker. If you want to contribute code, documentation or autotests to Qt, all the information you need to get started can be found at qt.nokia.com.
Other things of note:
Source Qt Labs Developer Blog